I'm looking for a simple way to track and get reports of internet use
on a computer.

I've checked a lot of the software like "net nanny" and "spy
software", and while they do track websites I visit, they do not give
me an easy simple report.  (something like "list of all sites visited"
 "time spent on each site")

Perhaps there is better software that I haven't found?

Or a different solution like a proxy service that I could use, that
would provide me the reports I want?

You can get the reports straight from your own computer.  It wont show
how loing was spent on a site, but when it was visited.  There is a
HISTORY icon at the top of your Internet Explorer.  It opens a bar to
the left.  You can view the history by a)By date: b)By site: c)By most
visited: or d)By order visited today.  The amount of time your
computer holds this history can be set by going to TOOLS (in the
toolbar above) then clicking on INTERNET OPTIONS.  In the box that
opens, you will see tabs at the top.  In the GENERAL tab, is a section
about HISTORY.  In there you can say how long you want to retain the
records of where your computer has been.  I hope that helps.
*saltytowers*