We successfully completed our internal upgrade to SQL 2008 and it is awesome. We did a complete revamp of our system and moved our CRM server and SQL server to a virtualized 64bit server then upgraded SQL to 2008 and it is great. The speed is fantastic and the move and upgrade were easy. The SQL 2008 upgrade was very easy and we're reaping the benefits. The enhancements to reports alone are worth it from a CRM perspective.
Check out some of the screenshots but if you are familiar with the slick looking reports that Excel 2007 has then you will be familiar with what SQL 2008 now has. There are gauges that Excel doesn't have (to my knowledge) that SQL 2008 has so that's one welcomed addtion.
Also, you can check out the Customer Effective Blog about this as Joel Lindstrom posted on this before SQL 2008 came out. My guess is that Joel has upgraded his system as well but you never know. We did and we're fans.
Here are some screenshots:
Dynamic Methods Inc.