I can't clearly find the old questions & answers from within dashboard or logged in to the WPMU site.
Can I suggest that (and I've mentioned some of it before under General questions before):
1. That the dashboard lists ALL your questions (maybe there could be a tab to sort by active or resolved?)
2. That the date/topic line list the same thing only ONCE (at present if you've made 5 comments it lists it FIVE times which is confusing.
3. There is no way to see if the last comment was yours or someone responding to you - could that be made clearer?