1 week after announcing 4.0b2 was to be released to the public, The R4 team has released it.
One plus side for existing r4i users is that there doesn't seem to be a revision. The update seems to only support up to 32gb cards as opposed to Mt-card's 64gb and Gateway's 128gb. Someone please verify if online is working via r4i gold.
Changelog said:Deluxe Edition firmware 4.0b2 is released ! (2014-07-15)
change log:
1.Support Multi-ROM
2.Support FAT32&exFAT
3.Support up to 32GB tf card
4.Support online play(to be tested)
5.Because of the 3ds system's updating, emuNand is delayed.
Attention: For the limitation of memory space, the MH4 patch cannot be added in this update, sure you can play the MH4 through Deluxe Firmware 4.0B1.
Source
EDIT 1: Video of firmware in action showing Multirom functionality, loading of a pokemon save and switiching to Mario Kart 7.