Ok, I have a board all layed out & routed the way I want it.
How do I create files, and which files, for a board house?
I opened up the CAM processor, figuring I'd just select Gerber files. There's 7 of them!
What's the standard way to proceed?
Thanks
When you are in the CAM processor, go to File -> Open -> Job.
Eagle ships with some standard cam files which you can typically use for most board houses. Personally, I use Seeedstudio's CAM file. It has all the appropriate files for a 2 layer board.
Here's the page for their service:
http://www.seeedstudio.com/depot/fusion-pcb-service-p-835.html?cPath=185&zenid=128fca630797f5a4ef92db874bb086d8
Here's a direct link to both their ERC and CAM file:
http://www.seeedstudio.com/depot/datasheet/Fusion%20eagle.zip
Thanks James!
Do I need to worry about all the 'stop mask' (seems to be values and outlines of parts over traces)
and 'width' of text that I put on the top layer errors?
tStop and bStop define where soldermask will not be applied. (Also note, depending on the board shop, tCream and bCream define areas that will have solder paste.)
Are you talking about DRC errors? Unless the components giving the DRC grief can't be moved, I generally ignore the mask issues. Usually I find it is a trace going to close to a hole or pad. The mask error could be suggesting that part of the trace will end up getting exposed.
What width did you use for text? I find that some places can't actually tolerate the smallest of fonts so I try to keep my fonts at 40mil or larger.
Yes, the DRC errors.
The 'width' of text being complained about is 0.04 inch, 12% ratio.
I took care of the borders of the overlap errors between the very edges of the borders of parts, just had to scooch a couple parts little.
The 'stop mask' errors all looked to be complaining about things like parts values.
The other thing I did was put in vias on top of the screw terminals; the library parts did not have large enough holes, so I added vias with the proper size holes on top of the connector, so I had overlap errors there too.
The 'stop mask' errors all looked to be complaining about things like parts values.
If you have text that overlaps where the solder mask (or solder paste) would go, you will get a DRC error. Also, you probably don't want to have silkscreen printed there anyway... I often find it necessary to "smash" the name/value/part and move the text to a suitable location.
How about getting the part Reference Designators to show up?
I have moved them all to the "25 tNames" layer like the Uno uses for the header names.
There are 3-4 parts where I can't get the info to show. The parts look like the other parts when I look at their properties, yet the names won't show up on the board layout.
I have tried re-naming, deleting the name & adding back in, what am I missing?
Are you sure the names aren't just being obscured by something else?
If you accidentally deleted the name, this trick can bring it back: cycle the smashed checkbox in the Info window for the part. (un/check while clicking apply in-between).
That did it! Big Thanks to you James 
I'm starting to realize I've spent entirely too much of my free time in Eagle... 