I've had what appears to be an unusually good experience so far. Over the two months since launch I've averaged about 10% of the android market sales. That's more than I was expecting and enough to make the initial effort worth while (as a non-US developer I needed to fill in a form and get a US tax identifier in addition to the normal app submission process).
I found Amazon support to be very helpful. They are responsive and available to talk to through direct personal email and telephone - a huge improvement over the "I hope they see this forum post" method of contacting Google. -- You received this message because you are subscribed to the Google Groups "Android Discuss" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/android-discuss?hl=en.
