I got my 770 yesterday lunchtime and have been trying out the different applications pretty solidly since then! I thought I'd arrange my impressions into two broadly defined lists, one of good points and one of bad.

Good

• The "Internet experience" is phenomenal. I have never used any device as mobile as this which gives me anywhere near like the same quality of, inparticular, Web browsing. This device is worth it for this alone. It's a bit like the sea change when I first got broadband, now I can access the Internet when I'm munching my cornflakes because it's so much easier than using my laptop. Add to that, the news feeds application which works very nicely and the integration to Internet radio which is pretty seamless
• The screen is superb. Never seen as high a resolution as this from such a small device. This is the main enabler for the Web experience. It also makes viewing video a treat. Which leads me to...
• I was a little worried, given the underpowered h/w specs, of the media capabilities of this device. But generally I've found both audio and video performance excellent. Both are best done through the integrated RealPlayer. The bundled Ice Age trailer is a good demo of the video capabilities and is pretty impressive.
• The extendability of the platform... I've already installed Gaim... this aspect seems pretty seamless

Bad
Most "niggles" these!

• The wireless connections management is a little more hard work than I'd like. Why can't it just auto connect to any preferred network? You can choose one network to auto connect to but then it doesn't seem like you can choose other networks! (Maybe someone can point me to how to do this)
• This isn't a niggle: the email client is incomplete for IMAP users. Seemingly no folder downloading and no separation of accounts. And I can't even get onto my work email which uses SSL on the inbound server.
• You can tell the h/w is a little underpowered. It's a little sluggish if you have a few apps open with large docs inside them. I've had a few out of memory errors with pdfs open, the web browser open and so on
• There does seem to be a few bugs in various applications. For a while my file manager wouldn't open, the GUI would be displayed and the folders would begin to list, but as soon as it showed the "Documents" folder it'd crash. I solved it by, as the folder list was loading, moving which folder I'd selected up using the cursor pad. It now starts ok. I kinda expect this kinda thing, as long as I can work around them I don't mind.
• I'm a little disappointed with the media formats supported: mainly because OGG isn't there but also, even RealPlayer doesn't support *some* RAM files for instance on the BBC News website all the high quality streams (low quality are ok but this would be really cool). Hopefully this will be fleshed out.

The bad are really, as I said, mostly niggly things, and the experience of web browsing on its own far outweighs the drawbacks. All in all this is a very impressive first effort for Nokia and the general approach they are taking to their device strategy is one I'm beginning to buy into. I used to be a fan of converged devices, but now having browsed on my 770 I realise 770 + UMTS phone is the way to go. I'll be putting in my order for the N80 next year