Setting up the wifi on the antminers can be troublesome, and I have found, lowers your hashrate... I don't know why exactly, but when I configured an old WRT54g as a Repeater Bridge and then joined it to my main network, and then just plugged my antminer hardware into it, I didn't lose ANY hashrate whatsoever.
If you would like help in doing this once you buy a WRT54G let me know. I was able to pick up 2-3 of these routers for $5-7 USD each.
short version is what he said, long version ends up to what he said... and it works... got an equivalent for my mining PC in the great out door smoking area.... and it works....