Waiting on multiple msg queues?

[Cam Fraser]

Our communications software would be greatly simplified if it was
possible to do blocking reads (and/or writes) on multiple msg queues.
I understand that Convergent Tech. has both a kernel AND a user level
mechanism for this.  This would provide for msgs queues what poll() does
for STREAMS.  Could this be done as a psuedo-device driver? Has anyone
done anything in this area? Alternatively
has anyone experience with using STREAMS as a local IPC mechanism? At
the UNIX V.4 conference the STREAMS people were not sure what the
performance hit would be compared to msg queues or even if a 
loop back driver is/would be available.
 
Any advice appreciated & I'll summarize depending on response.

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A guest here, really:
Cameron Fraser, Mobile Data International
 email: ubc-cs!mdivax1!fraser 
 phone: 604-277-1511
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