Just filed my 2006 federal and state tax return at
http://www.olt.com/ and to my surprise I am eligible for the max credit for my 2007 Camry Hybrid after alternative minimum tax is taken into account

The calculation of AMT on Form 6251 was very confusing to me who doesn't have tax software; before filing it online I thought I wouldn't get the max credit due to a misunderstanding when doing estimate on paper.
The efile website that I used last year doesn't support Form 8910, and it took me a while to find olt.com that offers all the needed service at a very low cost. Highly recommended.