SKB have just introduced the world's first amplified pedal board. It has a 5W amplifier and 6" speaker built in. It's main feature, of course, is that it is a world first. Other notable features are...um...I dunno...I mean you are going to need a proper amp for gigging, and if you use this for practice how do you get used to your stage setup? Maybe I'm missing something here, but I'm not sure there is a point to this invention.
The nice people at Rane have put together this list of how to write technical words and abbreviations that we deal with in audio engineering. For example: MIDI is all caps. If you don't know your acrynom from your elbow, you can find help here.
This link sums up why the mp3 format is inferior, with some audio examples.