The Sims 3 for Windows is available for pre-order already, with a release date set for 20 February 2009. The game has generated buzz among fans of muscular women because some of the marketing copy indicates that the "Create-a-Sim" application will allow quite a bit more leeway in terms of physical appearance and body type extremes. From the Wikipedia entry:

Individual fitness bars have been added to adjust the Sims' obesity and muscularity between extreme levels. Arm and legs are separate so players can create Sims with fat bodies and thin arms. In The Sims 2, there were only three body types - fat, normal and fit. As in The Sims 2, body shape varies with diet and exercise, so that Sims created as overweight can become slim by exercising and Sims created thin may become fat by eating too much and not exercising.

[The Sims 3 - Amazon.com]