Yeah that crap is weird at first.. hang on let me tighten up this tinfoil a bit. OK that's better. Normally I would say it's a hoax after the fact except the posts started 9 days ago and the "Operation Air Strike One" posts started 3 days a ago. I have seen a lot of weird stuff on usenet. Spammers, cryptograms and the like but nothing like that.
Looks like a bad attempt at "performance art" to me.
It wouldn't surprise me at all to see al Qaeda in possession of that kind of software. They posted graphics of intended targets in New York that were built with a very high end GIS planning system.
The massive amount of money available to al Qaeda coupled with their cadre of loony college graduates makes for an interesting adversary.