iSlayer, makers of the istat widgets we're all such a fan of, has just announced 7 new Dashboard system monitoring widgets, as well as a full iStat application (call me crazy, but I think these guys like keeping an eye on their systems). The new widgets more or less cover the same ground their iStat nano and iStat pro widgets do - they just take on the individual tasks of monitoring everything from CPU, memory, wireless, battery and even temperature performance.
The standalone iStat app offers a bit more customization options, as well as the ability to make it float above other applications or even stay at desktop level, so it can't get in the way of anything else you're doing. It also features a more standard Mac OS X preferences window, including a pane which states that Growl support is coming soon (for Growl cliffnotes: it's a system-wide monitoring utility through which 3rd party apps like Transmit, Quicksilver and - soon - iStat can display notifications of things like completed tasks).
All of these widgets and the new app are, surprisingly, donationware, and available now from iSlayer's website.