As I mentioned previously, I've had to start working on a bare-bones client so I have a way to test server development as it goes forth. This was a bit disconcerting, because the goal is the server, not the client, but I may have found a solution!
I currently split my rare programming time between two projects, this one and Windows Phone 7 development. I try to give them equal time, and with this project having the client development requirement, that was resulting in maybe 25% of my coding hours going to MMORF. However, I may have found a way to soon return that to the 50% it deserves, by moving the client development to Windows Phone.
For the next little while, I'll still have to put some effort into this console client, just to have that for quick testing, but for anything more than a text interface, I can certainly justify it as "Windows Phone 7 development" and use my phone development time for it. And if my other phone-related projects suffer because of it, well, I can bitch about it over on that blog.