I just announced a first (alpha-ish) release of Pier for VA Smalltalk:
http://blog.fitzell.ca/2009/11/pier-for-vast.html

It uses Grease, the same portability layer as Seaside 3.0a5 so may
prove fairly straightforward to move onto other platforms that already
support Seaside. There's still plenty of cleanup required though,
probably.

Julian