Over the holidays I cam across an even more difficult sudoku in the LA Times. Here it is:

3   4	5 1 8   3	7             8 1
6 7 9	5 3   6 1	9 4 6
1 8             2	6   2 4 1	5   9

And as I mentioned in my last sudoku blog, I have a solver and it is now available here. It is a pretty simple app but does provide for solving a puzzle or just doing an iteration to get a few solved cells. And if you press the solve button from the start it will tell you how difficult the puzzle is. The one above is 32.2.

Have fun!