Just got off the phone with HTC Support re the death of 802.11n on my Evo They said a maintenance
release for "Gingerbread Fixes" will be pushed within 24 - 48 hours. When asked what fixes the rep said he had no idea. Keep your fingers crossed!
Yes It looks like Gingerbread killed 802.11n Could not connect to home router which is set to 802.11n only.
Reset the router to mixed 802.11g and n and it connected.