Chuck, as I looked at the connection a little closer I realized it's not a bnc connection on that middle antenna, but instead it has a connection that resembles a picture I saw on amazon (RP-SMA). I'll try to locate a ham operator and see what frequency the antenna is meant for, I suspect it may have been a cellular antenna.
YC1, I stayed at two different campgrounds this past weekend and was frustrated because their wi-fi was too far away. I'm running a linksys router using dd-wrt software to act as a wi-fi repeater. Most of the "boosted" antennas I've seen are usb that require a direct connection with your computer. I did locate one that simply boosted the signal (2W 2.4Ghz Wifi Wireless Broadband Amplifier). I was also considering the TP-LINK TL-ANT2424B 2.4GHz 24dBi Directional Grid Parabolic Antenna at amazon. My satellite dish is not currently being used so I was thinking about attaching the antenna to it... hopefully that will give me a much great range.