Found objects! Stylist Sims has a modern set of furniture available. Link-
http://www.stylistsims.net/sims3/objects_01.html . I have not tried it in game yet but I wanted to pass it along anyway.
Note that these look like they are for Sims 2 but they are not. They are definitely Sims 3.
I am so happy to see this. Trying it out now, as this has made my eyes moist with excitement.
Trying them out myself, as soon as my dial-up collects them from the net.
Edit: Nice use of a custom logo to show it was downloaded.
Everything works in game, the chair/couch however default to brown coloring instead of black [like the thumbnail], so you have to recolor them yourself.
Also the bookshelf is not a bookshelf, and does not have the collision data for a object that size.