Nice. Just the other day I was contemplating the use of a specialized webapp that allows me to easily create mockups of new user-interface designs. However, Google Drawings now seems extensive enough to be able to fulfill most of my needs with regard to UI prototyping.
I believe I read about Balsamiq on HN a while ago; it must be tough for a small company to operate in an area that intersects with areas google might be(come) active in.
I think Balsamiq saw this coming, in the past two months or so they've been publicly progressing with their development. Templates with inheritance, online saving, and components (so you can say design the footer and headers for several pages and have them be the same element reused.) are all on their way.
My point is, even if you're now competing with a team from Google, you're not over and out yet.
I believe I read about Balsamiq on HN a while ago; it must be tough for a small company to operate in an area that intersects with areas google might be(come) active in.