Well X resource graph has a much better look, more options, but doesn't check mail. Anyway, Mail.app does and allows you to read it, so....

Useless, MenuMeters is far better.

for you it does not expand properly.

worked just fine this very moment for me.

If your demo version has expired, you can use this command (in the Terminal) to extend the demo period.

IF YOU DO THIS, PLEASE MAKE SURE YOU COPY AND PASTE IT PRECISELY HOW IT APPEARS BELOW. FAILURE TO DO SO COULD ERASE YOUR DOCUMENTS FOLDER, OR WORSE.

If you don't wish to use the command line, find a utility that lets you see 'invisible' files and then delete the ".nm" folder which is in your Documents folder.

rm -ri ~/Documents/.nm/

To call MenuMeters a "hack" means nothing. MM *does*, however, use unsupported means of getting its graphics (conveniently, IMHO) into the menu bar. I don't think there is anything dangerous about this, i.e. it is very unlikely to destabilize OS X. However, there is a downside to everything: it is quite possible that, after I have become totally dependent upon MenuMeters, Apple will "pull a Microsoft", whereby OS X 10.3 will be deliberately changed to prevent "unauthorized use of the menu bar". Hopefully, Apple will recall their longtime slogan "Think Different" and leave the API's used by MenuMeters (rather, its underlying software) alone unless there is a valid reason to change them.