Due to league rules, the Jazz couldn't introduce an alternate uniform last season when they got new unis. Now they can. At noon today they'll be revealing the new ones. There shouldn't be much shock. The alternate green uni was leaked in NBA2K12 a few months back.
And now it's available on NBAStore.com
UPDATE: This is is new uni. Much better.
The actual jersey may vary a bit. This doesn't have any blue on it. They look good though.
If you're not there already, head to the ESA for the reveal and a bunch of free stuff.