As long as you have the proper power requirements for your system, those devices should work just fine on the DN2800MT. You should not experience any kind of issues.
Proper power requirements... I'm guessing that a power supply that can supply about 120watts would be more than enough
(I'm working on a PicoUPS based UPS, since my desktop will be hooked up to it as well, I am making sure the whole thing can generate more than enough juice for the desktop and a mITX system.)
So the multiplexing will not cause any issues... yay