As I promised, here is a *very rough* example to create your own editor on top the map control.
I guess the Bing solution would be technically acceptable, but I'd bear in mind the cost of the license. As far I've realized, the min for ESRI is about US$100-500, while Bing starts from US$10K. ESRI is mandatory for a small solution, Bing is out.
Morten, two things.
1) I've sent you a mail, but I?ve solved my troubles (even I'd prefer to hear from you+team a little help);
2) I don't agree at all with you about the flexibility of the APIs. It's clear that you push for using the ESRI server all the time. For an hybrid solution (like the mine), the use of the APIs is cumbersome. Why not giving at least the very basic (e.g. Client namespace) source as open?
Cheers everybody
Mario