nah, the weapons in the new D&D books have almost no basis in reality, and seem to have been made up on the spot by the writers. plus, they're not very comprehensive.
here is a fantasy equipment list for GURPS, but it is not an exhaustive weapons list if you are looking for details or obscure exotics:
http://authors.aspalliance.com/steve...urps/equip.asp
a quick google search turns up this list of weights and measures of someones very large sword collection, as well as some historical data. mostly european, and not many details on weapon type:
http://www.palus.demon.co.uk/Sword_Stats.html
similar to the above, but a bit different:
http://www.pbm.com/~lindahl/cariadoc...n_weights.html
and this web site looks like it has more resources than you can shake a stick at:
http://therionarms.com/links.shtml