Hrant, there's a demo version: http://roundingufo.typemytype.com/

http://roundingufo.typemytype.com/

Wow.
So who uses it in actual production? Results?

hhp

Looks good. Is anyone working on something like this as a fontlab plugin? I would buy it

There is a somewhat similar round corners FL plugin by BetaType posted somewhere in this forum, but you have to apply it glyphs by glyphs, as opposed to an entire font.

IIRC Rounding UFO was developed to create the Unit Rounded family by creating two masters with different rounding values for each font and then interpolating a series with Superpolator to get the best results. And Linotype seems to have used it to hack out a crapload of rounded versions of classic fonts, although the successfulness of those designs is debatable.