I'm not a big fan of Notes and I wish to use Outlook at my new job. So I did some google search and found a connector and a registry hack that you need to do before installation.

Step 1.
Modify the registry
[HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\O utlook\Options\General]
"UnknownRowsSortOrder"=dword:00000001

Step 2.
Go to http://www.microsoft.com/downloads/details.aspx?FamilyId=8EBBBA59-5F17-4E52-8980-C4F0DFA92D65&displaylang=en
download and install.

Step 3.
Start your Notes client and then start outlook. Create  a new account and choose "Additional Server Types". Then choose "Microsoft Office Outlook Connector for IBM Lotus Domino". Click finish and then you are ready to use Outlook instead of Notes