A4C offers the Rocketfish 3G MiFi Mobile Hotspot, model no. RF-MFH2, for $17.95 with free shipping. That's tied with our June mention and the best deal we could find for a similar hotspot by $2. It allows you to use your phone's wireless internet to power. It supports up to five devices and does not require an outlet.
Of note: Best Buy Connect is no longer available, but this product works with Clear.