It doesn't wrap and extend dom elements, just finds them, so there's no $(this) etc just to be sure all your objects behave the same way, no .attr('id') to get attributes etc. It also has a nicer syntax I think, like the idea of doing HTML.body.ul.li.a So it looks interesting, though I wish they had included Ajax.

This doesn't do everything jquery does, and is not intended as a drop-in replacement, more as a different way of doing things which is simpler, smaller and more intuitive.