Custom Content also plays a big role in the Sims games, and Will is astonished by what fans have already made with the Body Shop - lifelike Sims and (recent) situations are recreated in the Sims 2. He's happy to see such an active community which has grown fast and already brought a lot of mods - but it also caused the problem of hacks joining houses on the Sims 2 exchange. Maxis had to find a solution for that, so people who didn't want to use hacks could get rid of them anyway.
In the future Maxis wants to enlarge the Sims world even further, by creating new neighborhoods, but also by enhancing the aspiration feature. The story-telling features, the photo-album and the movie creator, might also be improved. New tools are likely to be released at some point.
More tools will definitely be made by Maxis, but they will remain easy to use, like the Body Shop and HomeCrafter. More advanced tools will be released further in the future, while easier tools might be released earlier.
Finally SPORE, also known as SimUniverse is mentioned. The last name is quite specific, tells Will. He likes to create a new game that uses the important aspects of the Sims again. Freedom will again be important, and custom content made by fans will play a big role.
The entire interview can be found on this site - in German.