Screenshots taken of Metafilter pages on a Blackberry Curve 8900 BBOS v 18.104.22.168 using the default BB browser
Main page (logged in with plain theme)
Blank area to right takes up ~25% of horizontal width
Note: Logout is odd---takes me to a blank page, but I do appear to logout.
I can follow links
Profile page (logged out)
Lack of "edit profile" button, lack of javascipt in BB browser.
Thread page (note no significant differences between Metafilter/MetaTalk/Ask Metafilter)