Look what I found here:
http://www.nintendo.com/consumer/wfc/en_na/ds/results.jsp?error_code=206602&system=DS&locale=en_US
The nintendo customer support has to say this about the DSi Error-Code: 206602:
To redeem a Nintendo DSi Download Ticket number, such as for the Nintendo DSi Speak Channel, enter the number off the Nintendo DSi Download Ticket in "Settings and Features" off of the main Nintendo DSi Shop page, then select "Nintendo DSi Download Ticket."
hmm ... a Nintendo DSi Speak Channel... seems like a Skype-like app is confirmed now!!!!


)) We were just talking about this last week, too... a dedicated message board for DSi users. Awesome!!! Maybe they really are listening?