Not specifically Wow related, but might help people out.
After having to convert from "common" syntax patterns (hex string, with byte mask string) to IDA syntax by hand for too long, I went ahead and threw an app together. Enjoy.
To use:
Enter a pattern in the right format (\xCC\x12\x56\x11) on the first line. No spaces.
Enter a mask for the pattern (xx?xxx??xx) on the second line. No spaces.
Hit Go and out pops a pattern string you can use in IDA.