Here's a list that I re-wrote from this thread on Whiteblaze and the comments below. Sorry that I don't have time to make them all links, but it should help.

www.adventurecampingequipment.com
www.antigravitygear.com (mapdanas and alcohol stoves)
www.backpackinglight.com
www.bearvault.com/
www.beyondfleece.com
www.bigskyinternational.com
www.brasslite.com/index.html
www.cilogear.com
www.clikstand.com
www.etowahoutfittersultralightbackpackinggear.com/ [siltarps and stoves and sundries]
www.fanaticfringe.com (Thompson Peak packs and top quilts)
www.featheredfriends.com (Down bags and clothing)
www.gossamergear.com/
www.hennessyhammocks.com (well, sort of)
www.hikenlite.com
www.hikinlitegear.com/id12.html
hiknakd http://search.ebay.com/_W0QQfgtpZ1QQfrppZ25QQsassZhiknakd
www.ionstove.com/
www.jacksrbetter.com (hammock underquilts and such)
www.junglehammock.com/index.php
www.kickassquilts.com/ (synthetic fill hammock underquilts)
www.kifaru.net/TIPI_SLEDhm.htm (silnylon teepees that can accommodate wood burning stoves)
www.limmerboot.com
www.luxurylite.com/
www.lwgear.com/
www.mchalepacks.com
www.mogogear.com
www.moonbowgear.com/
www.mountainlaureldesigns.com (4-8oz packs, 10 oz 40F quilt, etc)
www.mukluks.com/ (Steger mukluks)
www.nunatakusa.com (high quality (and price) lightweight down sleeping gear)
www.outdoorequipmentsupplier.com (MacCat hammock Tarps)
www.owareusa.com (Ultralight tarps, 40"x60" plastizote sleep pads, bug bivy...)
www.pacerpole.com
www.rayjardine.com (DIY kits)
www.rbhdesigns.com/ (vapor barrier clothing)
http://rodneyslab.tripod.com/index.html
www.sixmoondesigns.com/
www.speerhammocks.com (hammocks, PeaPods, DIY kits, etc)
www.tarptent.com/
www.thepacka.com/
www.thru-hiker.com (DIY kits and materials)
www.titaniumgoat.com
www.traildesigns.com
http://trailquest.net/dlgc.html (aka Dancing Light Gear)
www.trailstove.com/index2.html (wood burning stove)
www.trekstov.com/ (Bushbuddy woodgas stove)
www.ula-equipment.com/index.htm
www.ultralightoutfitters.com [esbit stove, and more to come]
www.ursack.com/
www.vargooutdoors.com [titanium stoves, stakes, and cookware]
www.wanderlustgear.com/ [defunct?]
www.warmlite.com/start.htm
www.wildthingsgear.com/

Surely we missed a few. Just holler and I'll add them on to the list above.
-Mark

Edit: added suggestions thru 6-23

Edited by mlarson on 06/24/2006 06:40:42 MDT.