I would not buy one based on what I've learned so far. Having a dongle for 3G connectivity seems like a bad design decision. The storage seems anemic, at just 2gb, and the main memory being 256mb makes me wonder why I would want to get rid of my old N800 for this.

It would be acceptable if the dongle was in an internal or snap-in bay of some sort, so that it could not accidentally become dislodged and did not mar the shape of the device.