The one comment on the bottom suggests that there is a built-in utility with the IIS 6 Resource Toolkit to parse the log automatically but where's the fun in that?
More seriously, this post, like my previous post about Lisa's Coverage Profiler add-ins, show that while it's very tempting to say "give me a tool and I will use whatever it gives me"; with Visual FoxPro, it's so easy to build your own , quickly and easily.
I do this regularly with Outlook. I see some of the tools that are available on Slipstick and when they don't meet my immediate needs, just write my own in VFP. Fast, easy and it meets my needs.
Calvin's post is also interesting in that it's not using the MS Graph control but rather VFP's Line method to draw the graph.
Creating, parsing, graphing web hit logfiles or other temporal data