While we've known about the ability to transfer DSiWare to the 3DS for a while now and learned today about transferring software between devices (DSiWare, 3DSWare and Virtual Handheld), we've just found out that there will be a limit to how many license transfers you can make. From Play.com's product details:
System Transfer which enable users to transfer already purchased software from one Nintendo 3DS system to another. DSiWare purchased for the Nintendo DSi or the Nintendo DSi XL can also be transferred into a Nintendo 3DS system.**
**There is a limit to how many times transfers can be made. Some software may not be transferred
We've yet to learn whether this will limit transfers per game, total transfers per system or transfers within a period of time. Judging from what we've seen of the operating system, it appears that this feature will come after the system's release via an upgrade. How do you feel about this stipulation?