Usman gave an overview of Pachube at Homecamp08 this weekend, during which he outlined a number of features that will be coming in the next few months (including privacy & group settings; meta-feed "aggregates" with a number of statistical functions, permanent history and greater graphing user-configurability).
Chris Burman also gave a sneak-preview of "Pachup", a soon-to-be released plugin for Google Sketchup, which will enable you to have realtime Pachube data generate or modulate 3d geometries in Sketchup (and, ultimately, in Google Earth).
To see more, have a look at this presentation:
Pachube: overview @ Homecamp08
View SlideShare presentation (tags: pachube)
or see video documentation of Usman's Pachube overview followed by Chris's intro to "Pachup":
Re: Pachube @ Homecamp08
Good to meet in person at the weekend. Sorry I wasn't able to stay at homecamp long enough to see your session in person but thanks for posting it here.