2
Basically, you can do this with customising your theme and plocks already. At the moment, there are 5 kinds of blocks available, and you can do a lot with them (see
http://www.fantasyasylum.com for instance), when you use your creativity, some coding skills (creating custom blocks), and some design knowledge.
Your leftblockstop and toppageblocktop are center_l and center_r blocks, toppageblock and righblock are part of a center_c block, pageblockbottom is rightblock...
Herko