Clueless

The Microsoft Puzzle Challenge 2005 puzzles have been posted. If you have a twelve hour block of time, or nothing better to do, you can try your hand at a few. Of the 21 puzzles, The Puzzled Puzzling Oxen solved:

10 Step Crossword
Alphabetic Math
Avoid the Sharks
Don't Drink and Derive
Elementary, My Dear Watson
Crimson Hat
Sudoku
Opponents
Mangled Works

I would expect that those are the easier puzzles out of the bunch. You can get all the puzzles (and the answers) here. No cheating.