Just a quick post to say that my D3100 has arrived along with the twin lens kit. Haven't played much yet (still reading the manual)
First impressions, bearing in mind that this is my first DSLR and I'm upgrading from a Canon S5 IS are:
1) Very light. Even with the lens (18-55mm), card and battery, it's not much heavier than the Canon. Even my wife was comfortable with the weight (which had previously been her biggest concern with other DSLR's)
2) Quick compared to the Canon (to be expected) both in terms of the auto focus, time between shots and starting up
3) Very easy to use which is what I was chasing
4) View finder is nice and clear
Will be taking some shots on the weekend as a better test. In the meantime if there's anything in particular people would like me to try out / ask, please let me know!