There has been a good amount of news in the past few weeks for the 3DS capture device.
The mod will be available at mid June the earliest, but this is an
optimistic guess from the creator himself. I would roughly guess late July-August to be available at the latest.
It will be out in 2 different models.
USB only
USB & 2 HDMI slots
There hasn't been a price for either of these mods yet. I paid $50 for the DS Phat USB mod. Good chances these will be much dearer thanks to being a newer portable and much more wider range on playable software (DS, DSiWare, 3DS, 3DSware and VC).
Livestreaming with the DS has been a piece of cake, using Screen Region tool on Xsplit. This one will be no exception. Now if and I do mean if the HDMI can be downscaled through a converter to composite, in theory you can record (3)DS related footage onto the DVD recorder. I find this much more reliable if you are very concerned about frame drops. Then I can use the output from my TV to livestream with EZCap so I can livestream and record serious runs at the same time.
Yamihoshi has a 'work in progress' version where it's only good at taking screenshots. The video transfer is nowhere near as optimised that it will only record
3 frames per second when recording it.
http://www.youtube.com/watch?v=Wt5U4o-0hPE