Ive had 3.0 since Friday, the Gold version the one most will get tomorrow.
Theres lots of cool things in it, spotlight is suprisingly fast and the little touches like new icons for phone and ipod apps are good.
FYI. I got a text from o2 before saying that MMS is now up and running, they even sent me a little MMS too. I've tested it and sent a pic of my car to my GF and it worked. So tomorrow everything will be fine!