FWIW: I had minor issues with WiFi and my DROID, but it was from the router's end, not the DROID. I have no issues connecting to WiFi on campus (nice to be working with the uni IT staff - I know WPA keys that most students don't, and can use routers that most students cannot), but at home it would get fussy - especially if the DROID had gone to sleep for a while.
There were several times when I turned it back on and saw both the WiFi icon and the 3G icon - obviously something was breaking somewhere.
Turned out my replacement router from DLink (RMA'd my first DGL-4500 as i tended to just arbitrarily lock up) was the same hardware revision, but an older firmware that was ... dicey, to say the least. After verifying that the newer Beta firmware were actually doing well (my previous device experience notwithstanding) I took the plunge last week and upgraded my router firmware.
Since then I have not had a *single* issue with DROID and wireless. And since this is the holidays, and I have been home for much of the time, all that traffic has been 'routed' through my WiFi the entire time.
My router has an idiosyncrasy - it shows the DROID connecting using Wireless N (when in fact it only supports b/g) and there are tons of errors and dropped packets - but not with the DROID anymore - or, I should say, even if it is happening with the DROID, it is recovering faster and not producing any noticeable effects now, as opposed to before, where pages would not load, network errors messages were constantly being displayed, an idiosyncrasies like the dual icon thing would happen every now and again.