There is a list of apps folks want ported from maemo5 to 6 maintained here
http://wiki.meego.com/Porting_list_from_maemo
Doesn't seem to have been used much at all though unfortunately.
There's also the CDP apps list, many of which still haven't actually been done/started by devs
http://wiki.meego.com/Community_Offi..._program/Nokia