The Thicket gives a shout out to legislatures using social media. They also mentioned this:
Of course, some legislatures have videos on YouTube or YouTube channels (listed here) that can be viewed on mobile devices, and some states are optimizing other kinds of legislative content for handhelds. Kentucky provides an iPhone friendly site, and other legislative sites are optimized for the BlackBerry or other devices, including the Pennsylvania House Democrats website, and websites for the Texas Legislature, the South Carolina Legislature and the Washington Legislature.
You can find their mobile site here.