If you haven’t been there yet I highly recommend MP Dan McTeague’s “Tomorrow’s Gas Prices Today” web site. It delivers what it promises based on a formula that factors in today’s closing price for bulk gas on the New York exchange and projects tomorrow’s price.
–Updated Friday; March 12, 2010
The site even provides an RSS feed of the prices (featured above)!
If you have a phone with a mobile browser I recommend bookmarking either the web site or one of the RSS feeds. You could even use that RSS feed and a service like RSSFWD to forward that information to your E-Mail (or Blackberry, etc.)