I'm not saying that it's easy to push the Zippy Stroller through grass or over rocks, but it's possible.
zippy new sports car.
Google Desktop 4 beta is less clunky than its predecessor, and we love the zippy search and creative Sidebar Gadgets.
This WYSIWIG interface is pretty zippy too, although I may stay with Markdown and w.bloggar, regardless.
Whereas Marlowe is still really zippy, there are lots of things happening and I think Marlowe's ending is better as well.