Serial Library requiring a lot of memory?

CrossRoads:
I have not seen any problems with 1.0. I tend not to use many libraries - Serial, SPI, I2C, VirtualWire are about it. Anything else, I read the datasheet and write my own stuff.

Maybe I'll look into 1284 kits after tax season. I can't take that on right now. Got fencing club taxes, personal taxes, college financial aid forms, and a 56 seven-segment display project to finish first.
Just delivered another 10 Mega screwshields, those are pretty popular. Board & 4 connector types, easy to package up, no ESD concerns.

And about my last question?

Only question I have is the intended purpose of the 6 pin header in the corner of the board. Not real clear to me from the schematic what pins it actually breaks out? So far I didn't put header pins on it.