This deal has ended.
The D-Link 7dBi Omni-Directional Indoor Antenna is only $19.74 at Buy.com after a $20 mail-in rebate (expires 2/29). This item is designed to project greater wireless signal coverage in all directions. This is still the lowest price that I've seen anywhere. The antenna comes with a one-year warranty, shipping is free, and there is no tax (except CA, MA, MD, TN). Plus, you can get an additional $10 off by signing up for Google Checkout.