I just bought one myself (16GB). Anxious for it to get here and see how slow it actually is after the update they sent out. I figure if nothing else it can be a nice e-reader.
It's not so bad at all. It's now found its place on my kitchen counter, near the backyard door. I use it as a "waiting for the dog to come in" browsing device (ie, "I have yet to figure out what usefulness a tablet can have over my MBA"). My GF used it some yesterday around the fire I built in the backyard because her MacBook's battery had drained. She checked a few Facebook posts and stuff and went right back to her MacBook as soon as it had about 20% charge.
All in all, we're not really tablet people. I did download and install the SDK though, will play around with it, maybe even the PDK and write some good old SDL code (that brings me back!).
I guess we'll use it to dump pictures and carry around to family gatherings. It's always awkward using the iPhone to do that kind of stuff.