Marcia Hohn's site, Quilt Blocks Galore (Quilter's Cache) has over 3000 patterns, quite a lot of them are paper pieced, and she has a tute about paper piecing that she links to at the beginning of each block. Great website for lots of patterns, some traditional, some original - she also rates them in the listings so you know if it's easy (one pin) to difficult (4 pins). And she has a list of all blocks with colored pictures, so you can see what the blocks look like without having to open each file. VERY user-friendly.