Confirmed to work with iOS5.0.1 jailbroken iPhone 4.  My Dell 2330dn Laserprinter is connected via USB to my laptop and shared to the wi-fi network and it works.  I’ve been looking for a work around to this since iOS 5 jacked up my previous airprint hacktivator…had to $5 to get the app from the app store, but the lite version lets you check compatibility first before committing the $5 so it’s worth it…