Can't wait for Samsung to finally 'get the job done' and finish the Froyo update for your Samsung Fascinate? The brilliant folks over at XDA Developers have us covered. Someone leaked the actual Samsung Froyo ROM to them, and they generously decided to 'share' it with us! They made it a point to indicate that it is the actual Sammy ROM, flaws and all, and they won't be supporting it, but if you just gotta have it... it's here or here for you to use at your own risk. You brave souls out there, please let us know how it works in the forums.
Source: XDA Developers