Rollup 8 just hit....

http://support.microsoft.com/kb/968012

SP2 for Office 2007 has been released and there are some major improvments with regards to Outlook performance, especially in cached mode. These were back ported to the Feb. cummulative update but are also included in SP2 along with other stuff.

http://www.microsoft.com/downloads/details.aspx?FamilyId=B444BF18-79EA-46C6-8A81-9DB49B4AB6E5&displaylang=en

Wow..... the high availabilty changes in Exchange 2010 are a game changer. If it all
works as well as described every Exchange shop in the world will be redundant after
adding a second server. I remember asking about mailbox replication at the MVP
summit a few years ago but they weren't there yet. I'm glad to see they kept on that
direction and hope this turns out to be a solid feature. Paul has a good rundown of the
details involved:

http://www.robichaux.net/blog/2009/04/exchange-2010-availability.php

The first large scale review of Exchange 2010 is up (one of many) and it sounds like the

next version of Exchange might make up for all the sins 2007 did against the admins.  Only

time will tell...

http://www.infoworld.com/d/applications/first-look-exchange-2010-beta-shines-485

Rollup 7 for E2k7/sp1 looks to be a turd as well as there are many reports of the update

failing during the installation process leaving the server in an unusable state. Apply with

caution!

A recent update to Outlook 2007 really helps speed up the app and allows for much larger cached mode mailbox support (MS claims 5gb now across most hardware should get good performance). This is a big change from the 1-2gb they used to recommend as a max when using cached mode. I've tested this patch on a few systems and it does seem to make performance improvements but time will tell if those improvements stay.

http://msexchangeteam.com/archive/2009/03/24/450881.aspx

Well that was quick.... rollup 6 turned out to be a turd causing all kinds of issues. MS just
released rollup 7, hopefully it will be better!

http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=2074fefd-fa1a-4c3e-bf72-94585e454150

Just an FYI..... if your trying to run jetstress on a Windows Server 2008 box and having
issues with it starting, try disabling UAC on the server. In my case this resolved the issue
although I haven't seen this documented anywhere.