Jim,
Welcome to the Club! Have you gone on the basic AC webiste yet? John gives a nice rough over-view of how to set up a basic P2P network which with only 2 computers in the office is all you really need. It you want easy rock solid connections, then wires are always more reliable than wireless. But that being said many of us are using wireless with good results. I have tried a few and my Netgrear MaxRange wireless router with the seven internal antenas is doing really well here and we have 2 other networks near by and we use a 2.4 phone system to boot. But yes make sure you "lock down" your network good and tight no matter what you do. In Wireless use nothing less than WPA encription, use static IP's if you can and most importantly, use MAC addresses. Then only those specific cards, wired or wireless are allowed on your network. All others are not welcome and can not get in.
As I've said in other posts I first paid two different gurus to set us up with two different routers. I got fed up with being dependent on these guys and have less than stellar results. I bought Wireless Networks for Dummies and quickly learned how to lock up my system tighter and set it up better than these supposed experts. You are obviously an intelligent guy, your a doc for goodness sake, take some time over the weekend when all is quiet and you don't need your system to work. The first few times you struggle with it you may get a little frustrated, but do it once or twice and it starts to make sense.
There are many good posts here about basic set up and networks, brouse around. I'm sure you'll do just fine. Good luck in the next few days....
Paul
