I agree on the security issues too. I personally would not go wireless just because I Xfer lots of files between machines and 100Mb is much better. Plus in order to get the maximum speed over wireless, you generally have to be close to your access point. As you move away the signal can degrade. There are always variables in how good your connection will be with wireless.
I recommend keeping a wired network since its always fast and reliable. But if you do have laptops and want to check your email while you take a dump or something go for it.
It takes a big man to cry, but it takes a bigger man to laugh at that man.