Yeah, I got mine on Thursday and have been fairly impressed so far. Providing you set the options correctly, the internally decoded HD audio sounds great over analogues. The manual isn't very clear on how things should be set up though. The only minor niggles I have are that there's no frame advance/slow play and that the GUI is very low res compared to my previous machines. Other than that, it's very fast in all operations (loading, navigating etc) and not too far off of the speed of a PS3. I saw it for £270 on Pixmania, but they wanted £8.50 delivery. I got mine for £274.96 inc. delivery from Cheapelectricals.
The quality of the remote isn't bad. It's a bit plasticy as you'd expect at this price, but it's better than the last remote I used (for the BD-P1400) as the buttons are laid out in a more sensible manner. The blue back light is quite useful as well.
BD-Live is the online interactive portion of BD. It's a bit gimmicky at the moment though, usually just offering links to download trailers or take surveys. However, the new Iron Man BD has a cool quiz that allows you to answer questions on clips from the film, and in the future create and upload your own for others to try. The new Casino Royale has a Bond quiz where you play online against others to test your 007 knowledge, but it wasn't working last week. I'm guessing it's because it' wasn't officially released until today.
In the future BD-Live promises interactive commenary, where you and your friends can get online and watch a film together, chatting about it as you do so. There's a lot of other stuff it could do as well, such as offering additional bonus features after a disc has been released (commentaries, featurettes, trailers, additional languages/subtitles).