Thanks for mentioning this! I had also recently spotted it on the Wolfram blog and said this about it in a daily beemail:
Wolfram Data Drop: Lets you accumulate data from anywhere (including lots of devices as well as email and twitter and such), do fancy analysis of it, and query it. Would be cool to be able to point a Beeminder goal at a Wolfram Data Drop as its data source. https://datadrop.wolframcloud.com/
You can query it in Mathematica which also means you can create an API for querying it in other languages, using the Wolfram Programming Cloud. I guess this would all be more appealing if that were less roundabout. Of course Wolfram Data Drop is brand new so maybe they’ll add an API for querying.