I view Inventables as the Thingiverse of CNC. That said, I think that their website could use some upgrades. I would like to see better categorization and search-ability to the projects.
Thingiverse has projects where you can download G-code certified to produce good finished products on
their Maker-bot printers. It would be great if Inventables did the same. Then purchasers of their CNC machines would have a solid base of viable products to carve and sell.
As far as their machines go, I would like to see some stiffer machines with more power. Perhaps a bit lower price for the Carvey.
As far of Easel goes, it would be nice to have a workflow that would get you to 3D carving. Something like the ability to create 3D tool paths from a grey-scale height map or STL file.