Not sure why the WDW sites have picked up on this and nothing has been mentioned here yet.. According to WDWNT, they're testing this new type of meet and greet at DL.
edit - These videos were taken at Disneyland in California. That's where they're testing this
[ame=http://www.youtube.com/watch?v=qyHIdr1aM7s]YouTube - Mickey's House and the Talking Mouse[/ame]
[ame=http://www.youtube.com/watch?v=d6k2xdtU8Wc]YouTube - Talking Mickey at Disneyland[/ame]