Freelancer.com-like website but based only on BC payments using some sort of escrow-like system to make sure that employer has enough money? Can a project similar to Freelancer.com or elance.com but based only on BC payments be created or the implementation of BC transfer between the employer and the freelancer would be too complicated?

I mean, i.e. freelancer.com is using escrow for transactions etc. 

Is something silimar possible to develop but only for BC? If yes, is there some company that can do it like e.g. https://www.escrow.com/index.asp but with bitcoins?
Such projects are possible with Bitcoins. Generally, what you can do with money, you can do with Bitcoins.

Escrow services in Bitcoin were popping up every now and then in the earlier days of Bitcoin, but I don't recall any of them becoming too popular. However, setting up an escrow-like service should be fairly simple. If you need some help, you can drop me a line ;).