What I thought was a problem with MicroB on my N800 turned out to be a problem with OS2008s aggressive power save setting for WiFi. My router at home couldn't handle having the tablet's signal cut off so much and wasn't holding a good link. Everything else on my network was running well so it didn't look like a network issue.

I went to connection manager, manage connections, selected advanced, went to the 'other' tab, and reduced Power Save Mode to intermediate from high. Browsing is now a pleasure.