Do you have any idea whether there's a model with more RAM? I'm sick of my X1 Carbon but 4GB of RAM hasn't been enough.

Edit: The Chromebook Pixel might do but it's not particularly Free.

Looks like 4GB is it unless you want to shell out for a Pixel. http://prodct.info/chromebooks/#f&

Edit: Chart seems somewhat up to date at least, best I could find.

The original Acer C7 (now back-called C710 I guess) supports up to 16GB: http://normcf.net/~john/chromebook/Acer/acerC7ChromebookUpgr...

You could even put Coreboot on it.

People praise the C720 a lot but it has no upgradeable RAM which makes it a regression in my book.

My wifes old netbook is about to die. Unfortunately I only upgraded it with a 2.5" SSD less than a year ago. I was thinking about buying a chromebook for her but was hesitant, because I'd really like to reuse that SSD. Does the C720 come with standard 2.5" SATA SSD or is it mSATA/m.2?

It's an m.2 unfortunately.