Installed vlingo today on my desire and like a lot of the features. A couple of gripes:
-It won't do anything without internet access, even sending text messages or phoning people - what's that about?
-When using the hands free features (still in beta) it's supposed to start listening on a given voice command, but this doesn't work
-As far as I can tell, it doesn't integrate with the calendar ie "what's on today?", "add calendar entry"
-using eva, when you attempt to navigate, it automatically turns gps on if it's not already. That's a nice touch.
Would like to see some of these included in future updates.
I've just tried out skyvi, eva and speaktoit, but found them all horrible! Vlingo the most usable so far, despite the above.