I just found out these great sites: "stackoverflow", "superuser" and the others in the group, in November 2010. Since then, I've answered a few dozen questions, mainly on MATLAB programming.
[Today: 31 Jan, 2011]
My programming background:
1992- FORTRAN77, on mainframe machines.
1998- MATLAB / Octave (since this time, MATLAB versions: 5,6, and 7)
2002 C/C++ (a little)
2003 R (a little)
2010- Python (a little)
I have mainly use MATLAB for my research in science (other languages such as Octave for hobbies,) but am considering switching to R or Python in future.