According to the blog Kolma.info, which was apparently support ticket diving for apparently no reason, came across support number 206602. This number had some interesting info which isn’t on the site Nintendo’s support site anymore, but it apparently said this…
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.”
While the site reported the info, and Kotaku and GoNintendo have also posted on this news. I find it surprising that Kolma didn’t even screen shot the window and post it on their site. I’d treat this as a rumor and nothing more for now.