How reliable are they as always-on 'servers' wrt running off an sd card? Doesn't it wear out the card in a few months time if you consider all the writing to /var/log? Anyone had one running for close to the two year's it's been out now?
I think there is wear leveling that's pretty similar to SSDs. If you use a filesystem without journaling, it shouldn't be an issue. If the wear leveling is good enough, it could be that even with journaling, there's no problem. One could of course use jffs2 or another flash fs that has wear leveling in it if it proves to be a problem.
