as i know , kindle supports few kind of e-book file format, like mobipocket,txt and so on. so far, i just read my book in pdf or txt file. coz i hav no idea wif other format file. can anyone tell me what are the differents among those format? and the advantages and disavantages?
If I want to scan a magazine, is PDF format the more suggested file format? how about some text files? what is the different of text file in txt. and mob. or other??

sorry for my boring question, and hope that i can get to know this better.
(does anyone know how to change the pdf paper's size to fit the kindle DX display?)