You can do this already, granted it takes a little coding but BE can be considerably customised with only minimal knowledge.
There are some good tips to get you started, Al Nyveldt's post on
making the front page look different is certainly useful.
The ArthemiaPro theme also contains some nice customisations, looking at the theme's master and post files reveals much of the coding for this.
Following on from that, Jitendra did a nice little post for
image insertion in posts as an example of some of the other things you can do with BE.
my own site I required blank pages, I can do a little programming but I'm not a DOT NET developer, but had these working in no time.
Search around, it's quite surprising what you can do with BE.