Last week, Google launced a beta of their new Google Sync which allows you to connect to Google with ActiveSync (as if it were an Exchange server). Splat - and there goes the need for NuevaSync.
It's obviously not quite as black and white as that - NuevaSync do other things as well, and Google don't yet do the multi-calendar colour thing - but you have to be wondering how this is going to impact NuevaSync's model.
And it's not just NuevaSync. There are a whole host of small companies or individuals who are doing a fantastic job of setting up systems that provide value-add to the applications from the big boys - just look at all the apps that have sprung up around Twitter or FaceBook. So do all these people have to live in fear that one day they'll get squashed from above?