I've found out a few more things about the Zumo. At least about the pre-series version. Production devices may be different.
- The Zumo has, it seems, unlimited storage capacity for routes, waypoints & track logging. It can read/write this data to/from the SD card. This makes the Zumo a winner for long time & long distance travel.
- You can't switch off neither AutoZoom nor Off Route Recalculation. This makes, in my opinion, the Zumo useless for all kinds of active riding. It can't be used as a Moving Map nor as a Co-Driver showing up-coming bends.
It seems as Garmin with the Zumo aims only at taking customers from TomTom. This means aiming only for the dummies. Pity since the only feature the more active bikers needs is the option to switch off a few automatic thin
I'm very disappointed and I'll be very carefull with my 276C in the future. It's old technology yes but it's doing the job. Someting the Zumo isn't able to do.

It's very disappointing to see that Garmin is going backwards in usability and GPS-functions. Instead they are adding nonsense as MP3-player and photo album.
Maybe one should consider buying a Nokia N95 GPS instead. It has much more features than the Zumo. At a lower price! 5 megapixel autofocus camera, 7-band cell phone, FM radio, video camera, calculator, alarm clock, web browser, MP3-player, USB-memory stick, etc, etc.