I've had this phone for 2 years, was given an LG Smartphone for Christmas and have already given up and gone back to my 6300. I can live without querty keys, thanks! This is a very sturdy, smart, small phone but has good sized keys.
Just downloaded the mini Opera browser from the Nokia/Ovi site and can now Tweet, Facebook and Blogger from my phone, it's much quicker than the standard WAP browser that the phone comes with, you can even have the screen and browser buttons rotated so that you can use the screen landscape (little easier on older eyes).
Camera and photos still come out great (is it really only 2mp? It's excellent) and has the best battery life around (great if you use it for the music player too).