A couple of general comments.
Security: A post above says WEP is OK for them since they are in a residential neighborhood. IMO, that is the wrong way to look at it. The issue is, do you care if the bored teenager next door uses your internet bandwidth or snoops around on your computer hard drives? Given enough time (actually, only a few minutes for someone who knows what they are doing) and motivation, any WEP network can be cracked using ordinary PCs and readily available downloaded software. Bored teenagers in their rooms late a night wanting to bypass their parents internet filters sounds like time and motivation to me.
The only good excuse for using WEP is your computer wireless interfaces do not support WPA, and that excuse only holds (IMO) if upgrading is expensive (such as a built-in interface in a laptop). If you must use WEP, check the admin screens of your router frequently to check the logs of machines that have attached themselves, etc.
Second, you probably do not need to be too concerned with number of computers on the wired side of your network. If you are using 100Mbps wired internet, that will be about 4 times faster than your G wireless, and 20 or more times faster than your broadband connection. Your router will come with a builtin wired ethernet switch with the ability to connect 4 ethernet cables. If you have more than 4 computers to connect, just spend another $5 - 35 bucks (depending on sales, rebates, etc.) for an ethernet hub/switch. Make sure it is at least 100Mbps capable; there are still a few 10Mbps antiques sitting around on shelves.
Pay attention to cooling of the router. Keep enough space around it; don't pile your general computer desk clutter on it or let clutter collect around it. Heat is the enemy of maintaining connections, especially on the wireless side.
I am using the Siemens SpeedStream 6520 DSL modem / wireless router (my DSL provider insists on charging for the equipment; sigh). However, it works well so far. I have 3 WinXP Home machines and 1 Win98SE machine attached to the wired side through a Netgear 605 switch (for convenience in cable management), 1 WinXP Professional laptop and 1 Mac OSX laptop attached to the wireless side. Neither laptop supports WPA, so I use WEP on the wireless, but check it frequently. I'm considering powering the router down when not being used (such as overnight).
I put in a wired / wireless network for a small church that was on a tight budget. I made the mistake of buying the Hawking HWR54G router because it was practically free with rebates. It keeps dropping the wireless connection. Don't buy that one, even if it is free. It is not worth the money even then!
Stability, maintaining connections, thoughput, "proper" router functionality, and support of WPA are the main things you need in a wireless router. It is difficult to find reviews and comparisons charts anywhere except for the bleeding edge stuff. I wish Tom's would maintain an archive of his reviews of these now "plain Jane" routers from back when they were the latest and greatest.