2 1-9 as in vim (9=required for next release, 5=would be nice, 1=probably not)
5 - several tab related commands like :tab are enabled but don't work
8 (recent CVS regressions):
9 - 'autoexternal' doesn't work
12 9 check autocmd Events - which are applicable etc.
13 9 edit messages with vim
14 8 the archives need to be mailbox specific
15 - currently it archives mail to the first Archive folder found
16 7 :set! mailnews.wraplength=140 or similar
17 6 add a feature to show emails from threads under each other like in gmail