Would it be possible to have some additional graphs besides CPU usage and network usage? Two graphs I'd like to see would be memory usage (including swap usage) and the space used/available on mounted drives so I could know if I'm running out of space.

Thank you.

I'd also like to have a "yearly" and "all-time" graphing view for the existing graphs.

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Jay Faulkner
http://oldos.org

CPU and network usage can be determined external to your linode, but to get the mem and disk usages I think they would have to poke their noses into places they don't normally go. I personally would prefer that they not start exposing more kernel internals to a webpage.
I think it is fairly straightforward to set up your own monitoring of mem and disk usage with various available packages if that is what you want though.