Looking pretty good. Also wanted to apologize about giving you those 3 bum tuts earlier. They definately weren’t as helpful upon 2nd glance. Most people don’t even check the tut link so I figured you had not.
For your edges, I would grab them and click the extrude button. Set the height to zero and then change the area so you get a 2nd line on the top and bottom all the way around. play with the values so it looks right. Then put a mesh smooth modifier and it will round the corners without distorting your object bad like it probably does now.
Also, I would not recomend using booleans. they seen to mess up your mesh. Granted I have not used them since version 5 but suspect they still aren’t that good. Instead try Celticdog’s technique on this page. It will give you a much cleaner hole in the center area.
http://www.cgtalk.com/showthread.php?t=40373&page=28&pp=15
This same thread is where I found the extrude edges trick I just mentioned. I think it’s around page 49 or so if you aren’t clear on that technique. Very good good read and worth your time.