Performance questions regarding OpenBSD on Alpha

Hi there -

I've done a bit of reading and found a couple of comments that have helped
me out, but I have a few questions.  I'm hoping others on the list might
have some insight into the issues I might face with OpenBSD on Alpha in
a large production user environment.

I need to use yp, nfs and quotas in a single fileserver configuration
with about 10 clients supporting just over 30,000 users.  Typical 
concurrent numbers would be between 2500-6000 users at any given time with
consistent peak / lull periods within a 24 hour period.  yp look ups
shadow those peak / lull periods with requests between 2 to 6 per second.
Is there currently anyone with an installation/load like this?

I came across a comment in the 3.9 release that warned against using 
yp and quotas in a large installation.  My question is would that
warning be aimed at local quotas running on the yp client?  If the ypserver
is the host with quota'ed filesystems would this not be an issue?

How is OpenBSD's MP support for the alpha?  Is it something that currently
has interest and is being worked on?

As anyone experienced a problem with vnodes becoming locked on an NFS
client when the NFS server's active vnode count reaches 200,000+ and the 
server begins dipping into swap?  Do vnodes becomed deallocated and is
there a way to limit how they are cached?

Thanks!