Here's what I found today:
- Love to Know's Lingerie Community is a wiki group ranging wide, but necessarily deep, across the underwear landscape. The history section is scanty & questionable--as always, cross check your sources. It does feature a "panty gallery" presenting some of the variety offered to men and women.
- Serge Lingerie "Explore Your Lingerie World! If you are looking for information on everything related to lingerie fashion browse Serge Lingerie your guide to a bright and brilliant array of lingerie styles, designs, textures, and colors. We combined the convenience of the Internet with an ever-changing world of lingerie and created your ultimate information resource of women's lingerie online."
A celebration of the 100th anniversary of the bra from Lycra.com (with a partnership with Maidenform) with a very nice graphical timeline.
John Walsh put together the nicely written survey, A Social History of the Bra, in Aug 2007 for the 100th anniversary of the garment.