I love shopping, especially for dresses. It's difficult on-line because you are never sure of the fit or how the fabric feels, but here are some ideas that I found.
First stop:
www.dessy.com I love this site. It's very easy to use and not a lot of wait time. It allows you to see the different colors and combinations in most cases. It has many choices for search filters. And the search engine works!
http://www.dessy.com/dresses/bridesmaid/6518/
http://www.dessy.com/dresses/bridesm...aidLineDefault
http://www.dessy.com/dresses/bridesmaid/6519/
Not a huge fan of the bow, but with the right colors it might work.
http://www.dessy.com/dresses/bridesmaid/6528/
I really like this one. I've always been a fan of the lace overlay in this style. I know that it wasn't in your fabric choices, but I find with the right color combination is can give the dress a bit more personality. I've been wanting one of these for awhile now, but haven't had a place to wear it. I don't like the black and white though. The crimson and black is good as well as the purple and black. White lace doesn't always look great, but can work with the right under color I guess. You have to play with this one.
http://www.dessy.com/dresses/bridesm...aidLineDefault
Another one with a bow, not really a fan, but people must like them.
http://www.dessy.com/dresses/bridesmaid/d401/
I know you said no taffeta, but what a classic beauty this dress is.
http://www.dessy.com/dresses/bridesmaid/2729/
This is a different dress.
http://www.dessy.com/dresses/bridesm...tOrder=Default
http://www.dessy.com/dresses/bridesm...tOrder=Default
http://www.dessy.com/dresses/bridesmaid/d404/
Also the bubble dress is a different one. I like it because it's not the typical straight bottom.
http://www.dessy.com/dresses/bridesm...tOrder=Default
Next stop:
www.edenbridals.com This site isn't great. No search engine except length. Plus, the photos are more ads than anything.
They call it cocktail length, but it isn't too short.
http://www.edenbridals.com/7107-p-657.html
That's about all I can dig up at the moment. I'll keep looking. And to keep your sense of humor and be reminded of what you *don't* want:
http://www.uglydress.com/ 