Here's an interesting look at U.S. Home Price Performance expectations over the next year (as also referenced by WallStreetFighter). Based on the CME Housing Futures (the Composite being -3.3%) Las Vegas is expected to fare the worst (-5.6%) while San Francisco is expected to decline the least (-3.0%). Also are some charts of the historical year-over-year monthly percent change in the actual home-price figures for the 20 cities. "These charts paint a pretty good picture of the severity of the declines in home price appreciation across the board. The one exception is Charlotte, where a decline has yet to take place."
Grace Cheng also provides some data on the murkiness of the U.S. Housing market.