Just came out of an Acrylic (part of the Expression toolset)
walkthrough and it seems like Microsoft have really done their homework. It looks
like it will give a tremendous leg-up to web development teams smoothening the interaction
between developers and designers. I’ve spent ages in the past, cutting up images given
to me by graphic designers. Ok, that was partly because the designer had no web skills,
but a few years ago there was also a limitation on the tools available. There’s a Tech
Preview of Acrylic if you want to give it a whirl
More information about the productset on Somasegar‘s
(Corporate Vice President, Developer Division) Blog here