Good news for you folks running Froyo who are sorely missing your favorite paid applications from the new and improved Android Market. A fix has actually been around at XDA Developers for a couple of days, and it's as simple as pushing over a new build.prop file that spoofs the Market into thinking you're running an older version of Android (Eclair really is ancient, ya know?) while keeping your Froyo goodness intact. There's really not too much hackery involved, though you'll likely want to run a nandroid backup first, just in case. And if you somehow have Froyo but still have no idea what we're talking about, better to just leave this one alone. [XDA Developers]
Note: Make sure the file you push back to your phone is, in fact, named build.prop and not something else.