It's not a secret that Microsoft aquired Dundas Technology and Reporting Services will benefit from that. More specific, there's a chance that SQL Server 2008 will include these controls: 

  • Dundas Chart for Reporting Services (included in CTP4)
  • Dundas Gauge for Reporting Services (in work)
  • Dundas Calendar for Reporting Services (maybe in CTP6)

According to this post on the MSDN forums, the Dundas Calendar may not making it into SQL Server 2008. However take a look at these pages to see how your reports may look like in the near future:

What can you do in 5 minutes with the the new Report Designer? This (the visits report for this site per one month grouped by browser type):