Thanks, that's fairly helpful. I suppose as a follow up question though, I'd have to ask what the advantage is to different levels of dpi, and more info on that topic. I've seen general statements like 300dpi if you plan on printing, but only 150dpi for online use... I honestly don't even know exactly what the acronym dpi stands for, beyond the obvious context clues.

Also, I did a quick search for the article you mentioned, but I wasn't able to locate it.