eBox on ARM is going to be my next challenge. I'm gonna somehow get a hold of Ubuntu Lucid for ARM and run it in Qemu to see what happens. If anyone know where I can get these materials, I'll go ahead and try it.
The whole OpenWrt thing is sadly not going to pan out. I like eBox and am familiar with it. In comparison, OpenWrt uses up at most, 13MB of space to emulate most all of eBox's current functionality. It boots into memory so it would work great off a cheapo 64MB USB drive you have laying around, and will kinda sorta do exactly what you want. Might I mention it's an extremely fast interface that just loads everything instantly.
The problem is, it's not all interconnected, not everything is as easy to use as eBox, and who knows what features it's lacking. It's much easier to maintain and manage though because all you have to do is modify config files if you can't work with the interface instead of having no way of really backing up your eBox configuration in any portable manner. opkg isn't nearly as good or vibrant as aptitute, the repos are lacking some of my favorite CLI programs, and both cpan and cpanplus are heavily broken if I wanted to run perl scripts. That also rules out trying to fudge eBox on OpenWrt instead of Ubuntu, haha.
Personally, I prefer web interfaces that directly work with and manage config files because all of the functionality you could do without the interface you could do with it. There are always some limitations, but I think BackupPC is by far the best at giving you a fully-featured WUI which is basically just the config file in a nice wrapper. If eBox included a SysAdmin interface like that, I think I'd be overjoyed.
I like to play around w/ operating systems as if they were toys. Since OpenWrt doesn't work for me, eBox on ARM might. I'll constantly be looking for ways to lower my power usage whether that means going Atom or going ARM. ARM is going to be more restrictive and harder to configure, but it's surely going to be a lot more fun in the long run and something to brag about. The only way I can think Atom would come in handy is if all my servers became Atom servers (hopefully processors with VT), and I figure out a way to cluster them together, run them in an OS-level VM, and be happy everything is super portable. I mean, eBox in a VM means, if it goes down, just start up another one from an earlier snapshot. Lots of things to try, but OpenWrt is definitely out of the picture now.