Yeah, gentoo is pretty new. There are a lot of kernel devs lurking the gentoo forums, so you have a lot of options there. There's always very beta-level software in portage, but you have to set your configs to allow it... otherwise you only get tested stable packages.
A few things to know about gentoo:
1. You'll hear a lot about "optimizations" and "extreme CFLAGS" in your compilers. Most of it is bullsh!t. Extreme CFLAGS break your system more often than they help. The best to use is:
-march=<cpu type here> -02 -fomit-frame-pointer -pipe
That's safe. Anything else could possibly break your system, but there are stable configs that will net you a few percent increase in some apps, but they are very picky and not worth the time troubleshooting.
The optimizations mainly come with nptl, prelink, and knowing what is on your system.
2. USE flags are your friend (read about them).
3. emerge sync && emerge world
This will automatically update every single package on your system... it's great.
4. Search the forums. Every single problem I've ever had with gentoo has been solved by the community. Just search for your problem: "can't build firefox on amd64" and you'll find a few threads with titles like: "Firefox build fails on amd64 ***SOLVED***" The community is great.
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