I suggest getting a Linksys wireless access point/router. Having one myself I find it very configurable. I use Cisco access points at work but the multitude of options are unnecessary for home use. The Linksys does what you need it to and at a reasonable price. Try to go with the "G" standard it allows higher throughputs and is downward compatible to "B" devices. Just be careful of wireless phones or microwave ovens nearby as they will interfere with the 2.4 ghz wavelength they use. Just use common sense when configuring it to not broadcast SSID is the #1 mistake I've seen. Adding 128bit WEP is a very good safeguard. You should be able to get good flexibility with one of these access points as they also contain a 4 port switch if you wish to go CAT5/6 later.
