Thanks for the help fellas, a bit of poking around the EEPROM examples, and I think I have an idea what I'm doing now.
Now lets have some fun connecting 3 arduinos with one serial connection :D
One more quick question, can you use one pin as both INPUT, and OUTPUT?
I want any arduino that wants to send data over serial to check to see if pin 2 is LOW, and if it is drive it HIGH while your sending data then LOW again. but if pin 2 is already HIGH (another device is transmitting), wait X mills and try again. all connected devices would common pin 2 together.
The idea here is to common most tx lines and run to one rx, and same with rt-tx. this would make one arduino the 'master' it can send and receive to/from all, but the slaves cant talk to each other, so if I want to send a message from slave one to slave 2, I have to send messages to the master, and have it relay them back to the appropriate slave
not a big deal if i'm going to have to common two pins together as in/out, but if I can use one pin and dynamically switch between in/out that leaves me one more pin to actually use.
the 5min post delay is really annoying for a 'newbie' I can't even edit a post I just made for 5 min...