Elgg as a social knowledgemanagement tool

Hi all

I'd like to implement elgg as a social knowledgemanagement tool in our faculty for facultystaff.

Now i've got some questions ...

are there theme-designers for elgg? I'm also willing to pay for a customized design!

Are there possibilities (maybe with plugins) to aggregate content (pictures, links, statusinformation, tweets ...) from various web2.0 communities like flickr, twitter, facebook, delicious, my personal wordpress blog and other sources via RSS (or other ways)?