Heh. I was leafing through my copy of the Pragmatic Programmer while taking my shower (what's that you say; you don't shower at 3 am? Then you don't have an absolutely wonderful Australian web consultant like Mike that you're time synched with) and I found this little gem:
find . -name '*.php' -mtime +7 -print | xargs grep 'v2db.php'
Yeah I know I should know it off the top of my head but I generally look these up until I memorize it. And, if you think I'm blogging this because I **know** I'll need it again then please pass Go, collect $200 and get a Krispy Kreme. Oh wait. Here you go: