GlusterFS with Boost - any known good methods?

We frequently use GlusterFS ( http://www.gluster.org ) in load balanced clusters to synchronise the /files directory between the web heads. That works great but we haven't found (or investigated fully) a method that the Boost module could be used easily alongside? I'm hoping someone's already doing it and can provide a proven working example.

Boost in this scenario is being used to complement memcache and standard page caching to provide static page delivery for high volumes of anonymous users, open to other equivalent suggestions appropriate to the environment too.

The three issues I could think of are -

a)
the Boost paths need to be mapped to Gluster so that the heads all share and manipulate the same static files.

b)
Could Boost generate huge numbers of changes that generate a service impacting I/O - CPU hit when Gluster passes them around? We've scaled Gluster fairly far before but it is a virtual FS on top of a real one, synced over the network.

c)
Are there potentially concurrency issues if multiple Boost changes are triggered and multiple heads start interacting with the Boost store?

If someone has a proven setup they can share configuration for that would be ideal and avoids exploring some of the hypothetical problems too much!

Thanks in advance

Tim