I've been lurking and benefiting from the helpful people on this board for a while now, since getting my 5800. I thought I would "give something back" by letting you know about something I stumbled over on the 5800.
The phone is great, but I've always thought it seemed to lack some of the glitz of the iPhone UI. But while messing about after upgrading to v20, I found that if you go to:
Settings -> Personal -> Themes -> General
There is one theme listed on my phone "Sound Waves". Select it and press:
Options -> Theme effects -> On
Now the phone uses all sorts of nice animated transitions between screens, animated menu pop-ups and so on. Very nice, and I have no idea why Nokia didn't enable it by default.
Of course, it might just be that my phone had it disabled and everyone else gets this already...
Cheers,
Simon