Hey Philoman,
The AA5 is a nice, easy, deep dive. I was fortunate to be among the first to dive her when we lcoated the wreck in 2005. We released the numbers on that one right away since the chance of anything turning up missing before proper documentation was completed was very slight.
The SS Michigan also will be a great dive site -- for tech divers anyway. Jeff Vos, Bob Underhill and Todd White have done extensive video and still photography of this amazing intact wreck but we are waiting for a promised visit by the state police's new ROV before releasing the numbers to the tech diving community. Hopefully the numbers will be released late this summer or early fall.
We may even have another dive site or two to let everyone in on as the result of the 2006 search season. Stay tuned to the MSRA web site (below) for news.
I hope you enjoy diving for as long as I've been able to (35 years now and hopefully a lot more!).
Thanks!