theknot.com has a huge selection that can be sorted by designer/price/style/ etc... you can link to individual websites thru them.
also modernbride.com has spring 05 runway pix somewhere, so you can see the new stuff.
but - my personal favs are
watters: http://www.watters.com/catalog.x?line=brides
richard glasgow: http://www.glasgowbridal.com/Home.htm
jasmine: http://www.jasminebridal.com/index.asp
maggie sottero: http://www.maggiesotterobridal.com/
if you want pix of dresses on real women, check out the links on this site: http://www.magnificentbliss.com/knot/ and scroll down, and pick the bio you wanna see.