System Center Service Manager is a new product that Microsoft released last year to handle incident/problem/change management.  Currently the latest version is System Center Service Manager SP1, and there is a Cumulative Update for SP1 that you should grab as well.

A strong ecosystem is starting to spring up around this product, with tools and connectors that fill needs not build into the product.  To find the latest list of these items, you need to do to the SCSM 2010 Downloads page.  Here you can find a list of the latest tools and add-ons from Microsoft, as well as third-party vendors.  The Microsoft Exchange connector, and the Powershell Cmdlets are definitely worth it to download and install.