Here is a small collection of links for various 802.11b projects and accessories. There are several links for antenna construction also.

start building.......

http://www.hyperlinktech.com/

http://205.159.169.11/reference/antennas/2ghz_collinear_omni_lowpwr/

http://205.159.169.11/reference/antennas/2ghz_collinear_omni/

http://205.159.169.11/reference/80211_mod/dwl-650_ext_antenna/index.html

http://www.antennasystems.com/broadband.html

http://www.wlan2.dabsol.co.uk/antenna-page.html

http://www.dct.com/~multiplx/wireless/page11.html

http://www.nycwireless.net/Images/maxrad/

http://www.rfparts.com/home.html

http://www.personaltelco.net/index.cgi/WirelessLinks