RELEASE DATE: End of June First half of July. (GBAtemp was offered a review sample. So expect a review from me soon enough.)
THE GATEWAY 3DS WAS BLOCKED, SO DON'T UPDATE YOUR 3DS IF YOU'RE INTERESTED.
THANK YOU.
Do not share, link, or post roms on this thread.
Read the FAQ below for more information pertaining to questions you may have about the card. The old thread was becoming crowded, and information was being lost in the sea of replies. This way I can update the first post as new information is available.
Great news we have today, we here at MaxConsole have confirmed from resellers and original NDS flash card homebrew developers that the following news about the Nintendo 3DS is actually happening, the impossible has been done, there is now actual working Flash Card for the 3DS, not just for old DS games, but your actual 3DS games.
Gateway 3DS is the world's first 3DS flash card!
The GATEWAY 3DS TEAM proudly presents the first ever video proof that many thought impossible.
Supports all 3DS ROMs to date
Works on 3DS & 3DS XL consoles
We have confirmed from resellers and original NDS flash card developers that this device is real and coming very soon for your 3DS enjoyment.
Source
Official Site
FAQ sent to people from the Gateway 3DS Team
WARNING! Spoilers inside!
Thanks to Gamer for the original news post.

看求不懂

我只想知道到底有没有，什么时候出，都七月了

挑选了几句重要的句子翻译，其他的感觉都是废话，O(∩_∩)O~；GBATemp的原帖发布日期是今天早上，所有估计最近应该能看的评测了吧。
释放日期（销售日期）：6月底到7月中之间。(GBAtemp 拿到烧录卡的演示版（先行版），我会尽快的对烧录卡做出评测）
Gateway 3DS已经被新的固件所屏蔽，所有如果你对烧录卡敢兴趣，请不要升级你的3DS固件
今天得到一个好消息，我们从Gateway3DS的代理商喝开发人员处确定3DS的烧录卡是真实的，不可能的任务已经被完成，他能真实的运行3DS Rom，不仅仅是DS游戏。
我们已经从代理商和开发人员处确定了Gateway 3DS的真实性，并且会很快喝大家见面。