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Stanford has some top quality material up for CS. I have completed cs106a and am working on cs106b and they are both top notch! http://see.stanford.edu/see/courses.aspx

If you are looking at more web based stuff then David Malan (Harvard) has some great free stuff as well. http://cs50.tv/2010/fall/

MIT's Open Courseware is also top-notch stuff. The intro-to-CS and programming with Python has a set of lecture videos and assignments, I think there are a few others with lectures (including the famous 6.001 Structure and Interpretation of Computer Programs)

http://ocw.mit.edu/index.htm

It doesn't look like these are what you are looking for, but projecteuler.net and programmingpraxis.com are great. I imagine these are more for maintaining and honing skills, rather than building them, but still great.