For all those that help so much on the forum, I felt that I should give something back. It seems that IDOBUS has opened bookings for May and part of June. I did not have any trouble booking a 1 TRY fare in either direction. Be advised though, that the earliest ferry is at 7:00 on Saturday, Sunday and Monday. On other days, the first ferry is at 9:00.
Hope this helps for those who are interested in going to Bursa, and may have been waiting.Edited: 07 April 2013, 00:18