Freerdp's server component is pretty experimental and mostly undocumented. The freerdp package you're referring to is a RDP client, not a server. This was the best result I got for googling "freerdp server": http://askubuntu.com/questions/475776/can-freerdp-be-used-as...

Very much still a compile-it-yourself experience. When I was setting up my RDP server on my Mint media center, I went with xrdp + x11rdp setup detailed in some guides at ScaryGliders.net, although the same guy as released a bunch of scripts to do it for you, see https://github.com/scarygliders/X11RDP-o-Matic

I don't really want to deal with recompiling stuff and manual updates though, and expect others to feel the same, which is why I advocated x11vnc to the GP.