Released 1.4.1 of Wordsearch this morning. This is baed on a conversation with Andraž "ruskie" Levstik from the Source Mage project. He suggested using WordSearch for creating number searches. I wrote up a quick random number generator, and modified wordsearch to allow numbers to be put into the program. Here's the command lines to create what I think is a pretty good number search:

numbergenerator.pl
wordsearch.pl --wordfile random_numbers --similarwords --all --nonormalize

If you're really devious, --nosolution is also recommended.

He also mentioned that the Source Mage distribution will be including my program. Happy dance! :)