Those are all visualisations of data, but not really good sources of raw data themselves. A good place to start is the URL in Michela’s email, which includes links to a series of APIs you can use to get raw data:
If it’s likely that you’ll need a Very Large Dataset to do what you need (many of our measurements span multiple years and tens of gigabytes), please feel free to post to the list with a request in advance so we can pull down a copy of everything and bring it to the Hackathon on a USB stick. That way, your hacking won’t be held up by downloading a couple gigs through the local wifi :-)