You can also find tons of info at http://www.ucapps.de/ All midiboxes are listed and explained there, but also each and every midibox module is described with building guides and everything you would want to know to get your own build going :)
On that site you also can find links to other important resources, like our wiki (also mentioned by Levon in the post above), shops where you can order parts for midiboxing, and a pretty sexy gallery that holds pictures of a lot of beautiful builds which members has built in the past (pictures of even newer builds can be found in the gallery section of this forum).
Ofocurse you can also find a lot of help if you search this forum. If you have a question, chances are very high that it has been asked before, and that way you can find answers much quicker instead of having to wait till someone answers your post.
It is a kind of 'unwritten rule' we practice inhere; to avoid forummembers ansering the same questions over and over again, we urge newcomers to read, read and then read a little more - and don't worry :) to start out with you will probably find all of the information to be confusing, but quickly you will get the hang of it.
I'm really happy that you decided to give it a shot :thumbsup: Welcome to the coolest community on the internet!