As per their website MicroPasts is
'a web platform that brings together full-time academic researchers, volunteer archaeological and historical societies and other interested members of the public to collaborate on new kinds of research about archaeology, history and heritage. It is a place where enthusiasts (of any background) can not only create high-quality research data together, but also collaboratively design and fund entirely new research projects. In particular, we want to improve how people traditionally distinguished as ‘academics’, ‘professionals’ and ‘volunteers’ cooperate with one another (as well as with other people out there who as yet have no more than a passing interest).'
From a brief little play on my lunch break it seems that you can join in with archaeological research from the comfort of your own sofa.
I note that the PAS has the project on it's website as well as I would imagine they both work closely together. Certainly how MicroPasts aim of getting people to cooperate with one another will be interesting.
Another of MicroPasts aims is to be a crowd funding site for small projects. This part is under development but I look forward to reading the sales pitches.
I imagine these sorts of projects require a lot of word of mouth marketing to be successful so well here's my part!