Sudoku puzzles seem to be all the rage right now. Our local paper has been printing them (easy on Monday, very hard on Friday), but we don't subscribe; my husband brought one home from work one day and I was hooked.
The website www.sudoku.com has a Sudoku program you can buy, but www.sudoku.com.au has four levels of free Sudoku puzzles a day, which you can play online or print off. Thank God for the Australians! First The Wiggles, now Sudoku. What will they think of next? Also www.sudoku.org.uk has daily puzzles, and what appears to be a Sudoku blog, although the entries are not dated so I'm not quite sure if that counts as a blog.
And speaking of blogs, a Google search turned up:
Dan Rice's Sudoku Blog
Enjoy at your peril!