Anybody know if Messages has improved? The beta I'm using is buggy as hell.
Absolutely useless, unless you have started some kind of Apple religion and all your contacts have iPhones.
I encourage you to buy a cheap consumer embedded NAS to learn.
/edit to clarify, 99.9% of the software they ship has at least a few interesting bugs. Just have a look at their changelogs for 10.x.1 :-)