1) Solvate and many others.
2) Went with the current one to see what appeals to people, but like mentioned the industry specific landing pages will be a lot like you suggest.
3) Sign-In is both Signup & Login, the redundant one is just as backup (just to explain the thoughts behind it).
4) Still fiddling with this, most sites like oDeks et al do it, but nt yet sure if it's more effective (considering that you only have to sign up in the very last moment, eg order a job or offer a service)
5) 2 of the people just had this ones in B&W, will switch once we have a broader pool.
6) Right, submit on \n is still no good practice.
7) Highlight whats happening on the platform, bit of a placeholder now, but think more lively statistics, stories, industries, rankings here in the future.
8) 15% cut, we take care of the whole payment, landing pages etc.
9) Right, not all callback messages there yet.
10) This only happen if you "made up your mind" eg clicked "order" on a product, but a nice generic tutorial video combined with 9 would be nice.
Thanks again for taking the time, all the feedback, and the chance to start thinking about it while typing this.