SharART - When you log in, there is a check box, Remember Me (or something to that effect). Check this box and you won't have to log in every time you visit.

A scatter brush repeats an object. You can edit the brush in a multitude of ways. An Art Brush uses a bitmap (maybe a vector too, I'm not sure) and distorts that bitmap as you draw. OK Just tried it, bitmap or vector. This goes for both types of brush.