ambroseliao: I may do that longterm, there is a hole for a hook, though like I said the thread has two flats, so it would be very hard for it to twist.
Here's another photo with the tire mounted (which I found out today doesn't seal well, I think the new rim is slightly wider than the old one, so will probably have to get a new tire/innertube
I saw a schwinn rack that mounts directly to the seatpost, but it's only rated for 20lbs (and I don't trust it), so I'm going to build my own by bolting some aluminum tubes directly to the frame and add some aluminum strips for a platform. I modeled something up real quick in solidworks (I'm also an engineer, which comes in handy):
