There are a ton of web resources, just google indesign grep expressions
Here's one:
http://indesignsecrets.com/favorite-grep-expressions-you-can-use.php
and a helpful script from jongware (one of this forum's best grep resources)
http://www.jongware.com/idgrephelp.html
and thanks for the virtual beer; I could use one today. Image may be NSFW.
Clik here to view.