TotalVideoGames (TVG) spent some time with MJ Chun and had had the chance to preview TS3 for themselves:

Rest assured, gamers won’t be starved for content in the final game, with plenty of tools and features that will broaden their gameplay experience. As with The Sims 2, much of the modding will be committed through various character customisations, with EA now opening its doors for modifications of fabrics and designs that users can create or download from other Sims players. But even without these mods the character customisation is still notably deep, making it possible for gamers to create characters as obscure as an old man in slippers and a dressing gown with purple skin and fluorescent green cornrows.

read their hands-on preview here