Marten’s been busy over the last few days and just released a new version of a partial Seaside 3.0.7 port (Instantiations ships VA 8.5.2 with Seaside 3.0.6), which he needed for the latest bels and whistles of Nick Ager’s Seaside integration for jQueryMobile V 1.1.1, which he also ported and released on VASTGoodies.
From the package comments of Marten’s Seaside version:
V 8.5.1 - with FileLibrary Addition from Seaside 3.0.7 -> Caution: Not an official version. Use on your own risk. -> version needed for JQM 1.1.1 development (Marten Feldtmann)
So it is not actually a full port of Seaside to VA ST 8.5.2, but the File Library additions that are important for jQM (I guess that means virtual file libraries).