The current wireless networking market is very turbulent. 802.11a and 802.11g are new standards, and there's a proprietary 802.11b "turbo" based on somebody (TI)'s proprietary chipset (I think all the D-Link "+" models have this). It probaby would not be a good idea to sink more money than you have to into wireless stuff right now.
802.11B "Wi-Fi" equipment deals are common (see Hot Deals) if you don't mind getting the lower-end/mass-market stuff. That equipment is more or less all the same. I have heard bad things about the SMC wireless router's reliability. The cheap stuff all probably varies significantly in how good it is from a RF (antenna, etc.) perspective, but it's hard for people who aren't radio people to judge that by anything other than getting it and trying it out.
The Orinoco equipment used to be very good, but has fallen behind lately and is not price competitive with the mass-market stuff. The Cisco equipment is very good, but carries a Cisco price tag (for home, forget it).