We've recently partnered with an organization that provides nothing but business intelligence tools for Dynamics GP, NAV and AX.
The fact that we've partnered with a BI company is, in itself, not all that remarkable. The remarkable piece is that we offer it as part of our Hosted Dynamics solution! It's very reasonably priced on a per user/month fee and works exactly like the on-premise solution!
Technology for business intelligence solutions have come a long way (MS Silverlight and Excel 2010) and Hosted Dynamics GP is bringing some serious capabilities to the table for business intelligence.
Not to say that the existing reporting tools in Dynamics GP aren't great (SQL reporting services, Smartlist Builder, Report Writer, Management Reporter), but to really take your organization to the next level, you'll want to take a serious look at a Business Intelligence tool.