Late last month, I blogged about NuevaSync, a servicve that allowed you iPhone to sync with Google Calendar and Contacts (as well as Plaxo) over the air. A few weeks later, Google announced that they were supporting this feature directly. Google, like NuevaSync is using the Microsoft© Exchange ActiveSync© protocol to sync with the iPhone as well as Windows Mobile devices.
So, does this service make NuevaSync obsolete? Well, bearing in mind that I did not use the Google service, from what I can tell there are still reasons to use NeuvaSync. The first is that, while Google’s service allows you to pull data from multiple Calendars, it only does two-way syncing for your primary calendar. For someone like me with several Calendar that I need to be able to edit from iPhone, this is a big problem. NuevaSync handles two-way syncing on up to 11 calendars. The second reason to use NuevaSync is that it will sync your Contacts with both Google Contacts and Plaxo on the same sync service, so for people that use Plaxo, that’s one less service to sync your iPhone against. Also, both the Google service and NuevaSync are in beta, so niether wins on that score.
So, if you have an iPhone you have a choice of you to sync your Google informaiton, direct to Google or through NuevaSync.
PS: People have been asking me about similar services for Blackberry. Google has a Blackberry sync service here and look fairly well supported.

I have been using the Google/Black Berry Calendar Sync for 6+ months. I have multiple calendars and sync from many places and love it.