You might look at the Selle Italia SLR, if you haven't:
http://www.teamcyclist.com/store/Sel...P2502C1148.cfm

A nice-looking saddle (I think anyway), 135 grams, and I think it's pretty comfortable (I've never ridden it for any great distance, but I have ridden it on bikes that I've test-ridden, and I liked it).

Also, I think the Selle San Marco Aspide Composite is super sexy:
http://www.teamcyclist.com/store/Sel...P8422C1150.cfm

and only 100 grams. But I'm not sure I'd ever be hard-core enough to ride a carbon saddle with no padding or covering at all...