Sent the final patches in (including the Scheme implementation stuff and the test suite) on the 13th. Hopefully this'll be the last go-round -- well, the last go-round before it's done, you know, as a feature. There're certainly some bugs in there.
Ludovic just committed a patch I made to Guile's reader a while back that lets you use postfix colons to signify keywords (e.g., foo:), and tacked on a trivial implementation of SRFI-88 that just sets the appropriate `(reader-options)' flag. Not having compatible keyword-parsing was standing in the way of some other cool stuff, notably SRFI-89 (Optional positional and named parameters) and SRFI-90 (Extensible hash table constructor). I'm working on a SRFI-89 implementation now in the form of a conversion layer for Guile's (ice-9 optargs) module.
In other exciting(-ish) news, it looks like Ludovic and Andy Wingo are going to revive Guile-VM, possibly for inclusion in 1.10. Rock!