I'm not quite keen on regexps, but I get good results with
[a-z_\-\.0-9]+@[a-z_\-\.0-9]+\.[a-z]+
... And that was a reply to this, but i'm too stupid to click on "quote" :
madjo:BTW, I see a possible spamtrap in Google's new code search... Many dev's will put their email address in their comments, and you could possible program a spambot to parse the search results in search of those email addresses...
That's a good observation.
On Google Groups, they automatically munge email addresses in the
'From' sections of the post (and maybe the bodies, too - can't
remember). They should be able to apply the same technology here easily
enough.