Thank you all for your comments / information.  I'm one of those 'new' Exchange Admins.  I've only been doing it for about three years.  (That's 'new', right?)
Well I actually DID encounter some problems with store.exe causing user-side memory errors (Exchange 2003).  Two company users received a "90% memory used" - type of error message on their workstation.  Sure enough, Store.exe had used up a huge amount of RAM (about 650Megs, out of our 1Gig available) which resulted in our server utilizing about 90% of the RAM available.  No, there were no performance problems (unless you count the error and inability to send e-mails with any decent-sized attachment).  Ok yeah, so there WERE performance problems. haha.  Here comes my question....
Can I limit store.exe to a specific amount of alloted RAM (perhaps 500 Megs for example)?
Thanks. - joeywinn@yahoo.com
Joey Winn
Network Administrator
Bellomy Research, Inc.