I have not been able to connect to my office WiFi since installing a 2.2 ROM. I tried these ROMs (With full wipe and delete cache between installs): BuglessBeast, Kangerade, CM6, Lithium, and ChevyNo1's. I tried a bunch of different kernels too: p3, ChevyNo1, and others.
My home Wifi works fine though (venerable Linksys WRT54g with WPA2 & TKIP encryption). I even tuned the Cisco Wireless access points in the office back and forth from WEP and WPA/WPA2, and TKIP and AES encryption. Nothing seems to work. After trying to connect a few times, I get "Disabled" in the connection status. Yes, I already tried the "forget connection" option.
I also have 8 Co-workers in my office with DROID 1's (All stock), they had no problem connecting at the office. However, last Friday they all got the 2.2 OTA update from Verizon and now none of them can connect to the WiFi in the office. It seems to be only certain wireless routers/access points that do not work. I thought it had something to do wtih wirelss security or encryption, but switching modes did not help and it doesn't explain why my Droid works fine at my house.
This is clearly a firmware/software problem with Froyo 2.2 and even VERIZON have begun acknowledging it. Google...Motorola...whoever...let's get this fixed ASAP.