It appears as though Microsoft have replaced their MSDN Feedback Center with a new site called Microsoft Connect. Everything that I ever submitted to the MSDN Feedback Center has been migrated across which is very good news.
Read an intro about Microsoft Connect here.
I am hoping that this signals a new direction in Microsoft''s commitment to soliciting feedback. Whilst being a strong advocate of the MSDN Feedback Center I have, in the past, been very critical about Microsoft's use of it.
-Jamie