If you buy through them then they more than likely will support your multiple connections whilst doing it yourself you do your own tech support.
If you aren't looking to transfer files inbetween computers a bunch and just want to surf/download files then the Linksys "B" BEFW11S4 for like $48 bucks + a wireless nic which would cost about another ~$20.
If you plan to transfer large files between computers IN YOUR HOUSE, then you would want a "G" router which is about $20-30 more than the "B"