No other SDA owners? Some personal observations
 

I got my SDA just recently-I tend to do that with all of my gadgets as I can't live on the Bleeding edge :wink:

Not really givng a review, just some observations after having it for about 2 weeks:

It's lighter than I thought it would be.
The on board memory is very sparse. A memory card is a MUST!
The call quality is great. Granted, I use it for prepaid so I didn't make many calls from it, but the sound isn't watery.
Sound quality is good
Seting up wireless (I use WEP) can be a tiny bit frustrating but it doesn't take too much time. Sometimes I had to input my WEP key a few times and check to make sure a connection is made. I've only tried this on my home network and not at any outside hotspot.

Tis all for now.

I have an SDA also. Mine seems to crash more than I think it should and the 4-way controller isn't very responsive. I wish there was some kind of OS upgrade out there for it. I haven't been able to find any good navigation type apps that will work on it.

The Tornado is still one of the best smartphones ever made.
Gnat, it shouldn't be crashing so much unless you're doing something really funky to it. Mine was surprisingly stable back when I owned one.

As far as OS upgrades, there are TONS over at xda-developers. I used the imate Sp5m rom, it was much more responsive than the stock T-mobile.
Also, some folks have ported wm6 for it, although I didn't have mine anymore by then.