For all those that have been experiencing fast battery drain due to wifi being hung (not being able to find wifi spots after disconnection, until reboot of the device), there is an open bug report at:

https://bugs.maemo.org/show_bug.cgi?id=6416

Please leave your comment there, and vote for the issue. You have to register, but it's real fast. More people report this issue, better are the chances of getting it fixed.