I run a PIX 515 and I can't tell you how handy that web-based administration tool is. It's called the PDM (PIX Device Manager) and it does require that you configure the firewall to permit your IP to view it. Once in, you'll have all kinds of sources of information, including those pretty graphs, but a great deal of very meaningul data as well.

In the config you should some lines which look like this:

http server enable
http 66.79.125.86 255.255.255.255 outside

You'll need to include your workstation's IP here in order for you to view the PDM, which does use https: and Java.

Check out the docs for the 515's website online.