Every player gets a gameboard with a 5 x 5 matrix. Two dice are rolled and the numbers are filled in the fields. The goal is to get the best combinations. After 25 rounds the game ends.
Since your Wurfel Bingo dry erase cards are going to get gross, and the ink will run out of the pen, download and print these sheets (use both sides if you can), and give them to players. Wurfel's player count is only limited by the number of scoresheets!
As the title says -- a simple spreadsheet to calculate scores. Really, why bother with the game board? Just play directly in Excel! It also works on a PDA (e.g., DocumentsToGo) so you can play along even if you don't have enough player mats to go around!