Yay! Math is fun. 8)
What kind of math? Have you heard of Project Euler? (http://projecteuler.net/index.php?section=problems).
Also, check out "A Problem Text in Advanced Calculus" (http://www.mth.pdx.edu/~erdman/PTAC/PTAClicensepage.html), which is a pretty awesome calculus book released under a creative commons license. Be sure to read the front matter though -- the book is organized a bit differently than you've probably seen.
hehe, I discovered that I liked math at the beginning of this year. :D It is fun! :D
Muse with me. Please?