Pachube, the “plumbing system for the Internet of Things,” has widened the range of services it offers at no charge. This means, among other things, that a much longer data trail is now available from their API and otherwise.  For example, here’s 6 month’s worth of PEI-New Brunswick Energy Interchange:

And here’s the same data, but for the past week:

Because those graphs are coming from Pachube’s web service, they are always up to date, meaning that if you’re reading this blog post in 6 months, then you’re still looking at “the last six months” and “the last week” of data.