Cache control for CSS and graphics

[eluser]grumm3t[/eluser]
[quote author="John_Betong" date="1285349989"]
Have you any suggestions for third-party button Javascripts such as Twitter, Digg, StumbleUpon, Reddit, etc?

The remote source code appears dynamic and sends the page-views or Stumbles, etc. to the individual buttons.
[/quote]

A lot of the social sites have "open" APIs that you can use to code your own solution, but you have to consider the effort of doing so versus the performance reward you receive. Your custom solution will require updates over time as the external APIs change.