Over at CustomSims3.com Amjoie has been pushing through all CC in her game and testing what does and does not bluelot.

So far the objects she's discovered were all clones of the orchid vase or the fig tree and the foosball table was the other major culprit she found.  Lemoncandy did use the orchid vase as the clone base for a lot of her smaller plants and the fig tree for the floor plants, those and any objects by other creators cloned from those objects are at least part of the issue.  Amjoie has been procedurally checking through all of the CC she uses to compile some lists of verified good (at least in her computer) and bad CC.  If you'd like to take a look at the objects that she has found to compare notes or report any specific objects that you've discovered, feel free to check out these threads.

Good CC Thread

Bad CC Thread

Thanks for your time.  Hopefully this will shed at least a little light.

Of course.  It's the next logical step beyond the Fanta Fridge, the Prius, and the JCP-teen inspired line of clothes they've already tried to cram down our throats.   
Next up it'll be Motorola cell towers and Roto-Rooter vans for that extra-tasty bit of ad culture to your happy little town. 

It's not a new town map, but if you're really hard up for that do-it-yourself approach there's always http://bogsims.com/sims3/ under "buildings"...clean Riverview and Sunset Valley maps with or without community buildings.  Admittedly, it's just a tide-you-over as we all sit here hoping that they'll release the Neighborhood Editor sometime in the next lifetime or so, but it's better than hanging out with the 'dozer tool all night.