New to the group and might be misguided because I'm not exactly seeing how these two would co-exist, but my initial assessment is that it would be best to focus on MakerMap as a resource for makers to buy things and get work completed.
There are lots of resources for jobs out there, but there's nothing that caters to special needs of makers for resources. Thomasnet is ok for finding outsourcing of projects, there are the regular online suppliers like digikey/mcmaster carr (I'd often rather source local and in person if I have the option), and lots of google map searching will help to find various stores and suppliers(sometimes)... but having that all in one place... that would be amazing.
At the same time, I can see how a job board for maker types with a cross-section of skills that aren't normally advertised or easily classified could be useful, but again I would see that as a secondary goal that doesn't necessarily fit smoothly with the makermap concept.