First and most importantly... you mention that your "clients" won't put up with the sync issues. This seems to imply that you want to use LinuxMCE as a commercial offering. You need to be aware that you cannot do that without a licence for each device from Pluto. The majority of the code is released by Pluto under a GPL/LGPL however some of the critical core components are released under PPL (Pluto Public License), which for all intents and purposes is the same as GPL for amateur users, but definitely not for professional providers.... then you need a licence, otherwise you could be competing directly with Pluto with their own product!
I do know of the licensing and will definately support the product if it is able to do what we need it to do. I think that this is one of the coolest systems I have seen to date. Although I am able to replicate all of the functions within this system it costs much less then say a Kaleidoscape/ Crestron / IP PBX / Control 4 / ETC. would cost in order to replicate all of LinuxMCE's Functions.
I would place an order of 100 lincenses immediately if it is bug free. (we have 6 houses about to go into design phase in the next 2 months and I am sure more to go soon after that) All of these homes are large homes looking for Complete automation. Which I think LinuxMCE is capable of doing almost completely on it's own.
So for now allow me to lend any hands I can in order to get this system up and going along with you and the community. (do you guys need RS-232 hexstring info for any of the following devices?)
Lutron Radio RA
Hope I can help