OWA Mail Checker, keep alive
This Greasemonkey script keeps your Outlook 2010 OWA session alive by refreshing every 60s. It's basically an update of http://blog.hacker.dk/2007/10/greasemonkey-owa-mailcheck-keepalive/ to work with Outlook 2010. Make sure you use the light version of the app when logging in.
It will also show the number of unread emails in the title:
