UPDATE 2:  Several bug fixes have came out and DevHook is now on v0.41d.  For those that want the most updated FULL version, heres a download link: http://rapidshare.de/files/23636317/DevHook_v.41d.rar.htm 

UPDATE: A new version of DevHook has been released, v0.41a. According to Booster, the version brings a few fixes, sadly not 333 MHz wifi.

• Various fixes when browsing ISOs from the XMB with Home + L/R in ANYUMD mode – 2.6 ISOs also now can be read from the XMB.
• Fixed a bug which wouldnt restore wallpaper properly after returning from sleep mode.

Current new PSP titles now compatible/working include:

• Astonishia Story (USA, works- replace the PRX files with 2.5 ones from Street Riders)
• Breath Of Fire 3 (use PGS release, with Save working)
• Bust-A-Move Ghost/Deluxe (EUR, USA- works now without the patch. Press START to quicky bypass the intro hang)
• Cabelas Dangerous Hunts: Ultimate Challenge (USA, works with StarWars BattleFront 2 & Street Riders PRX files)
• Capcom Collection (WiFi works- with 1.5 PRX files renamed)
• Colin McRae Rally 2005 (works CSO\’d)
• Daihoukaijidai IV: Rota Nova
• DJMax Portable (all stages fully working now)
• Dragonballz (WiFi works)
• Eureka Seven (JAP, Save works)
• Exit (USA, works now without the patch)
• EyeShield 21 Portable
• Field Commander (WiFi Infrastucture works)
• FIFA Street 2
• FIFA World Cup 06 (works with StarWars BattleFront 2 PRX files)
• Fight Night (remove update, and delete the .pad file OR compress to CSO format via CiSO v1.00- you can leave it as .cso too, no need to rename back to .iso)
• Genso Suikoden I & II (works with Street Riders PRX files)
• Gottlieb Pinball Classics
• Gradius Portable (now works without the patch)
• GTA: LCS (WiFi Multi-Player works- no errors now from iSO and UMD- remember you\’re not using your flash1 setting, so you\’ll have to make a new connection)
• Infected (USA) UMD (v2.00 working with WiFi and Save)
• Initial D: Street Stage (JAP)
• King Kong (USA)
• Lemmings (EUR)
• Lord of The Rings Tactics (EUR)
• Major League Baseball (working with WiFi and Save using Street Riders PRX files)
• Me And My Katamari (EUR and USA, work with PPF Patch)
• Megaman: Powered Up (WiFi works- you can download maps on-line now)
• Metal Gear Acid 2 (JAP, working with WiFi and Save using Street Riders PRX files)
• Midway Arcade Treasures
• Monster Hunter Freedom (WiFi working)
• Mutajuice (KOR)
• MX vs ATV: Unleashed (with Save working and Sound)
• Naruto Portable (WiFi works)
• NBA 06 (USA) UMD (v2.00 working with WiFi and Save)
• NBA Ballers Rebound (WiFi works)
• NeoPets, Pinball: Hall Of Fame
• Pac Man World 3 (USA) UMD (v2.00 working with Save)
• Piposaru Academia 2 (with Save working)
• Puyo Puyo Fever (EUR, use JAP PRX files)
• Race Driver 2006 (working with SOCOM PRX files)
• Sakura Taisen 1 & 2
• Sangokushi VII (JAP)
• Shanghai (JAP)
• Shin Bokujou Innocent Life (USA) / Harvest Moon (JAP) (works with PPF Patch)
• Shin Megami Tensei Devil Summoner
• Simple 2500 Series Portable Vol. 1: The Table Game (JAP, replace with PRX files from Eureka Seven)
• Simple 2500 Series Portable Vol. 2: The Tennis (JAP, replace with PRX files from Eureka Seven)
• Simple 2500 Series Portable Vol. 4: The Unou Drill (JAP, replace with PRX files from Eureka Seven)
• Simple 2500 Series Portable Vol. 5: The Block Kuzushi Quest Dragon Kingdom (JAP, replace with PRX files from Eureka Seven)
• SOCOM (New Campaign Mode and Save now work)
• SOCOM FireTeam Bravo (USA) UMD (v2.00 working with WiFi and Save)
• Splinter Cell Essentials (EUR and USA, works- replace the PRX files with 2.5 ones from Street Riders)
• SpongeBob SquarePants (works- replace the PRX files with 2.5 ones from Street Riders and CiSO it)
• Street Fighter Alpha 3 (WiFi and Save working)
• Street Riders
• Street Supremacy (USA, aka Tokyo Extreme Racer JAP WiFi working)
• Talkman (JAP and KOR)
• The Dog Happy Life: Vol 1 (JAP, apply PPF patch)
• The Sims (USA, can be CiSO\’d to 461MB via full compression with Save working)
• Tombraider (works with Worms PRX files)
• Untold Legends: The Warrior\’s Code (use 222 MHz, works past gatekeeper now)
• Vulcanus: Seek And Destroy (KOR)
• World Championship Poker 2 (USA, WiFi and Save working)
• World Championship Poker 2 (USA) UMD (v2.00 working with WiFi and Save)
• World Series Of Poker (USA) UMD (v1.52 working with WiFi and Save)
• World Tour Soccer
• Worms: Open Warfare
• WWE Smackdown! Vs Raw (EUR, USA working via UMD- press START to quicky bypass where it hangs)
• WWE Smackdown! Vs Raw (KOR, iSO working untouched CiSO\’d, needs 2GB MS, run at 333 MHz)

All of the above games tested using the same settings as follows: UMD Select: Select Your iSO File, UMD Mount: ISO ANYUMD (set it), Firmware: 2.50+2.00 (set it), Boot Select: Reboot XMB (set it), UMD Version: 2.XX -> 2.00 (set it, or you will get a 2.6 error), and CPU Clock: 333 MHz / 166 MHz. NOTE: If you want wifi to be enabled, be sure to put your CPU Clock to 222 MHz/111 MHz, instead of the latter option.

Via [ps2nfo]