Today iSlayer released iStat Pro 4.5 which not only updated the UI and some of the standard features, but added some new features as well. From iSlayer's blog:
Updated network section with new details & controls for PPP/PPPoE connections
Improved PPC temperature and fan support
Improved Intel temperature support
Improved S.M.A.R.T. drive temperature monitoring
Fixed bugs with battery section and 10.5
Clicking on a disc icon will now open the drive in finder
New keyboard shortcuts ("g" - Update external IP, 1-8 - Change skin color)
Added button to launch Activity Monitor
Other various bug fixes
Various UI tweaks
Activity Monitor launcher
The ability to launch a drive in Finder by clicking on its name
iSlayer Pro 4.5 is available for Intel and PPC Macs running Tiger or Leopard and is donationware.
