Sony has announced a firmware update that will allow the a-mount lenses to AF with the adapter. Same for the E-mount camcoeder (VG10) in November.
"Available from mid-October, a firmware update adds fresh functionality to the NEX-5/NEX-3. Autofocus operation is now supported when using A-mount SAM and SSM lenses with the optional LA-EA1 Mount Adaptor (upgrade for NEX-VG10 is available from mid-November). There's also a new custom function that allows assignment to buttons of frequently-used functions, plus a new function to record movies with setup aperture."
http://www.marketwire.com/press-rele...na-1322078.htm
Terry