I'm probably being stupid but... If it's a thread-on then surely it should be slim enough to fit as a front? ..and if it's a freehub then it can be unscrewed so it will then be slim enough to fit??
Can you not take the freehub off like this...
I've just bought a rear specialized tri spoke and want to convert it to a front wheel or a fixed but haven't recieved it yet and I dunno what hub it's got.
The seller of this auction seems to think his Specialized tri-spoke can be run fixed/freewheel and front or back...
http://cgi.ebay.co.uk/carbon-tri-spoke-700c-wheel_W0QQitemZ230282617369QQcmdZViewItem?hash=item230282617369&_trkparms=72%3A1121%7C39%3A1%7C66%3A2%7C65%3A12%7C240%3A1318&_trksid=p3286.c0.m14
Todd, have you managed to get your cassette off yet?