Happens all the time.
There are now three of us who regularly clean out the garbage.
If you'd like to help, click on recent changes, open up the infected pages into separate tabs, click on history for each, select a previous, uninfected, version, "edit" that version, (you'll get a warning about editing an old page,) put some comment in the comments line about correcting spam, and hit submit.
This makes the old page the new page.
It would be best that if you corrected one, you corrected all, (in the way described). This way one isn't missed and left to fester because no one noticed it hadn't been cleaned up.
You can get cleaner instructions off the original wiki 'site, but they've evolved a bit, so those instructions may not Quite be appropiate for this 'site any longer.
