Why? What do you do that needs that kinda speed, most wireless approaches are for convinence, not speed and all sorts of things can soon get that 108 down to 1mb. If you need 100Mb you are best to think of a wired solution.
http://www.linksys.com/servlet/Satel...VisitorWrapper
May be a good recommendation if the WRT54G that many here have is anything to go by.
http://www.wi-fitechnology.com/displayarticle1502.html
Netgear seem to be the 108 Mb people, this is done with two separate 54 streams. Both require the correct (proprietary) hardware at both ends, and connecting non speedboosted hardware is likely to cause a speed drop anyway (like connecting a b device to a g network).