One site that has always snapped me out of my writers block is The Linux Gazette. It is full of little snippets of fun code that you can play around with.

For instance, this article on turning your desktop's background into a live satellite weather report got me excited about programming again. Of course I rewrote their shell scripts using perl, then played around with LWP and Image::Magick, etc. After two hours of very enjoyable tinkering, my "writers block" was gone. ;-)

-Blake