I've heard conflicting reports on how much RAM it has... I've heard 256 meg and 512 meg. I hope it's the latter.
I had some minor WiFi problems... once it asked me to re-enter my stuff, but only once. On my local network, it was fine, but trying to use hotspots, it was very iffy.
I returned mine today since I have a 3G on order, and I miss it terribly. For me, it's SO cool being able to hold the thing in my hands and surf. I'm not tied to the computer (even though I love my Mac). I don't care that Safari refreshes the page, it only takes a moment. Besides, since they allowed Opera Mini on the iPhone, odds are good we'll see Opera for the iPad too.
Anybody who bashes the iPad as being "useless" (or anything like that) doesn't get the point of it. I do realize the thing isn't really meant for "real" work, but there are apps that allow it. I have an app that lets me RDP into my Windows servers. I have another that lets me SSH into my Linux servers. I have another that lets me ftp. For something as small and portable as the iPad is, it's perfect for carrying around and CAN be used to do limited real work in a crunch. I love it for that.
Since I'm getting a 3G, I plan to get a mount for my car and truck so I can have it at my fingertips when driving. That way I can have email on the road, and also have all my music too.
So come on Apple, let's get those 3G's shipping please!
Rob