Here in Long Beach, CA there is an urban Wal Mart as part of the City Place development. It has an adjacent parking deck. City Place is an outdoor mix of retail and residential situated as part of downtown LBC's urban grid. It's a great concept, but has been struggling with the recent economic turmoil.

http://www.longbeachcityplace.com/Site%20plan.html
http://www.longbeachcityplace.com/Eventsandphotos.html