[avital]

Hi, I work on Blaze.

HTMLBars is an excellent project and indeed does share many design principles with Blaze. They also differ in a few ways. For example, HTMLBars plans to never support full inline expressions in templates, whereas that is an explicit future goal for Blaze. So even though parts of HTMLBars could have been used in Blaze, it wouldn't give us the flexibility needed to take Blaze in the direction we think is best for our users.

[edit: Also, Blaze is shipped. :)]