Linux distributions for ARM processors

There are two ways to get a custom Linux running on an embedded device, in general:

1. Search the web for projects describing how to port some distro to exeactly the device in question. If you find it and it looks well described, you're a happy person :) My tip here: Look at success stories first! See what actually can be done (what final functionality did people get).

2. Advanced: use generic porting procedures, such as described here. You will need to do a research on your own, to find out what peripherals are supported, where and how to get drivers for them etc. One thing's for certain: You will need to build custom kernel for that and most often it will include getting a specific kernel version and a lot of patching. In many situations, there might be a high risk of bricking your device involved.

There is also Ångström Linux project that aims at porting Linux to different machines. Use it's online system builder to create a custom distribution - if you find that the machine is supported.

Always remember that in majority of cases at least some parts of the hardware will not be (yet) supported. Always have a close look at what's achievable before you start.

One might also take a different approach to the "Advanced" option, specifically in the case of Android-based devices: Since the given device runs a Linux-like kernel, you can use it with all the ready modules etc. But then you'll have to adapt the standard Linux userspace programs to play nicely with the not-really-linux core.

Skype has no official support for any ARM based device, as you alreay know, you could create a debian package on your own. Extracting the meego package, repackage it with adapted paths. Use ld/ldd to get any dependencies. Be aware that this may or may not work depending on the compiler options used for skype/ubuntu (ARM ABI, hard/soft float, neon extensions, ...).

You should also be aware of license restrictions, i.e. repackaging and/or redistribution may be prohibited.