different formats for different content types

hi

the way a blog may be structured is different from how a forum may be..in terms of width of the posts, colors used etc.

it would be nice, if you could offer this option...

i.e. by default all content types can have the same settings..or else if one chooses, one can modify for each content type accordingly.

Also, is it possible to inline text/images while the ad is placed vertically.
thanks