For those of you in select cities, Skybus just posted a whole bunch of new $10 flights. Looks like we're going back to California in February, too.
All in all, after taxes and airport fees, it works out to roughly $84 round trip for two people. You can't beat that.
And for anyone concerned about flying a start-up airline, Ashley (Rachel's sister) has already flown without incident. Their was a slight concern about the flight attendants, considering they're slightly younger than most, but that comes with the territory when they receive a mandatory $7 per hour (plus commission on the "perks" they sell.
Anyway, if you're looking for a cheap vacation, it's a great way to go!