Is this available on dvd in the US yet?

There is no 'official' DVD release available as of Oct. 17, 2010. 你 can sign up on amazon.com to be notified if/when it is ever released and available through them.

NOTE: There is at least one company who is selling the complete series on DVD, taken from TV broadcasts. This is not a set 你 want to buy, the disks will be defective and support non-existent, at an exorbitant price. Beware 'click dvd store'!