Hi - sounds like an awesome project!
Sorry for the confusing directions! Our thoughts on the various licenses and boards have changed over the years.
The [Eagle footprints are good to use. There should not be any more limits or notes on them.
The [OpenLog is totally open. Go crazy with it. All we require is to maintain the license and attribution. So in the case of your own product, we would ask that you keep the attribution in there somewhere. Such as ‘originally based on OpenLog from SparkFun’. And that the CC-SA-v30 for that portion of the schematic/product be kept open under the CC-SA-v30 license. You are welcome to make money on your product. We would just like people who dig into the schematic/pcb to know that a bit of it originated from SparkFun. Kind of for timeline purposes. It will be neat some day to take a look at a product and see what a mashup of other open products it is.
The [SerLCD is REALLY old so it comes from a time when we were a bit more paranoid. I’ll try to spend some time pushing it more open. For now, I’ve removed the ‘not for commercial use’ language and linked to the CC license.
So in general, yes, go crazy. But please give credit and attribution where possible. We encourage you to keep your product as open as possible.
Let me know if you have any other questions.
Cheers,
-Nathan](SparkFun Serial Enabled LCD Backpack - LCD-00258 - SparkFun Electronics)](http://www.sparkfun.com/commerce/product_info.php?products_id=9530)](http://www.opencircuits.com/SFE_Footprint_Library_Eagle)