Which shared memory module to use?

[Henri Asseily]

This is somewhat OT, but I need an answer from within the DBI community:

I want to release a new DBIx module, DBIx::HA (for High Availability).
In this module I need to do some work on shared memory segments. What 
Perl module is most in use to do that? i.e. which module should I 
support?
I was thinking about IPC::ShareLite. Is that one the "best" in terms of 
distribution, or are other ones more ubiquitous?
What about IPC::Shareable?

Thanks.
H.