I Sudoku, Do You?

I have discovered the World of Sudoku! Our local paper just started printing a Sudoku puzzle each day - Level 1 on Monday up to Level 5 on Friday. I finished them all this week, thankyouverymuch. Tonight I discovered I can play ONLINE! Wow! And it's so much easier than doing it with a pencil and/or pen! I even did the one in the TV Guide this week, which uses letters instead of numbers (a bit more challenging because I had to keep referring to the list of letters used, but I did it!). So I guess this is my new hobby. I even bought a book of Sudoku puzzles to take in the car with me on vacation next week. Good exercise for the brain!