I've found the stuff about software serial... theoretically could use that for the LCD and the hardware one for the wireless... that's what I might end up doing, but I've also seen stuff (look at the Atmega168 data sheet) about serial addressing, but I don't know how it works or how to use it.
So it seems like you can communicate with a lot of serial devices (through addressing and "virtual" serial ports) but only one at a time... generally not a big deal if you set your code up right...
Since I'm doing a timing system, I can assume that for at LEAST a second after taking a reading we're not going to need to take a second one, I can ouput all the info to my serial devices (I would imagine it can do it in a second or less) then go back to listening for another signal. Also, if I need to take information in, I can do it at that point.
That works for me, in a broader spectrum and for other applications, I don't know.
Also I still know nothing about how to actually implement all that stuff... but it seems possible.