I upgrade from P&S, and DSLR is a big Big improvement.
- multiple shots per second
- even photos from "Auto" settings looks better than my P&S (Canon A630)
- dim lighting shooting also not much issue
- I am capturing more candid photos of my "active" kids.
End of the day, I might not be able to see immediate difference between (D5000, Cano550 example), but DSLR is a new platform for me to start learning.
I could not justify paying a few $hundred more, to get "latest" cameras.
To me, D90 offers value for money, and price drop over the years have been most sustantial.
My DSLR selection journey, reference -->
http://sengkangbabies.blogspot.com/2010/06/nikon-d5000-or-canon-550-daddys-new.html
For now:
1. learn from the gurus in this forum.
2. lots of practice
3. avoid getting poisoned
4. how come so little children photos from D5000?