[UPDATE] - Update is now live... sorry I wasn't able to update this as quick as I wanted to. Just a day late...
Things to note:
New version is 4.0.0.7U - thx princefarzan
eShop has been revamped - thx Nollog & others
"be careful if you update make sure you keep the 3DS plugged AND you have a stable internet connection, or your device would render useless". - good tip Coto
Flashcards:
Working
Supercard Dstwo - has been updated for 4.0.0-7u thx japzone
Acekard 2i (with the sword icon, 1.4.4 update) works - thx elisherer
R4i Gold 3DS from www.r4ids.cn working on the current firmware - thx jrk190
EZFlash Vi - thx MarcusRaven (whoops, sorry all, misread that...)
Not Working
??