Thanks for the reply MP!
No, We're not going to have quite that many graphs! I was thinking more like graphing the network traffic, CPU and memory usage over time, etc. We only have about 80 hosts (and most of those are switches) so I'm not going to need many graphs.
I really was looking for something a little more efficient than our current solution: we use MS SQL Server Reporting Services to graph the MySQL data via an ODBC connection--slow, bloated, and underpowered! I can take a look at PnP or nagiosgraph + cacti (I've heard good things about both). Thanks for the ideas!