Just because a logo for a service called "3DSWare" showed up on the official Nintendo Greece website, it's no indication that such a service exists. At least, that's what Nintendo told VG247. The company said that a "technical issue" accidentally made public a "temporary logo" put together by Nintendo's Greek distributor.
"This logo is in no way related to any unannounced services or features for Nintendo 3DS," said Nintendo, "and was simply a placeholder used whilst the website underwent construction work and has since been removed."
Which means we're back to there not being a known download service for new 3DS games -- in other words, the 3DS download service is a step back from the DSi. Why is Nintendo working so hard not to announce this, again?