My satellite receiver has the odd bug, but otherwise it is generally a pretty good piece of hardware and software. However, the bugs and the inability to fix them, are something I wish I could do something about. The firmware, is written in MIPS assembly language, which runs on an Ali 3602 chip. Scanning through it, you can see interesting things like the license for Linux-NTFS, something which was reported to the GPL violations mailing list several years back (with no action taken).
Anyway, I can't afford the main interactive disassembler out there, IDA. So I have my own, which has a token amount of features comparatively. Peasauce. Up until now, it only disassembled m68k machine code, but I've just finished adding basic MIPS support. It's nowhere near perfect, but it's a start. And it shows how much work goes into IDA.
The next architecture is likely to be ARM support, although it like MIPS gets more complicated. There's ARM and ARM thumb instructions, and they are different sized and mix together to some extent. There's also MIPS32 and MIPS16, and they are different sized and mix together to some extent. But that's a problem for another occasion. The work on this could be endless, if I had the time.