Server statistics monitoring?

I'm working on setting up a new PostgreSQL database server, and would like to be able to monitor a number of statistics on it, such as:

number of connections
number of queries
query times
etc.

All these stats are easily available, either from the pg_stat_statements view (which I have enabled) and the like, or the log file (turn on log connects/disconnects), and I figured there would be a plethora of options available for monitoring these things. However, in searching around so far all I've found are a couple of hosted solutions. Granted, they look fairly nice, but we'd much prefer to keep this in-house. Paid solutions are fine, as long as the cost is reasonable, but we do want full-control. Before I spend my time writing my own solution, is there anything out there that can make nice graphs of various postgresql metrics? Thanks.
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Israel Brewster
Systems Analyst II
Ravn Alaska
5245 Airport Industrial Rd
Fairbanks, AK 99709
(907) 450-7293
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