Visit www.curvychick.com, the home of Bombshell Magazine, the newest plus size fashion magazine that is coming out.
You'll find a link there to www.shopbombshellmagazine.com that features clothing from the top plus size designers (Svoboda, Darren Trentacosta, Anna Scholz, Tadashi, etc). You can also find tons of links there and a very dynamic community of other plus size women who can help you find specific items that you're looking for. There is also a free curvy chick marketplace - sort of an ebay where you can buy and sell plus size clothing for free!
Check it out - it's a fun place to visit and it's a GREAT fashion resource.