Personally if you want to run a Mac wirelessly, I'd invest in an Airport base station. I have a couple of Macs in my house and I used to run them wirelessly across a fairly high end router and was constantly having connectivity issues. I finally invested in an Airport Extreme Base station and almost never have a connectivity issue.
Now, having said this, the Airport should work fine with the Linksys router, but the more I mess around with wireless the less happy I become with the wireless solutions that are available. I've tested a variety of ones from Netgear, Linksys, and Proxim and so far the Airport Extreme has been the best and most reliable; even with Windows PCs.
