Just as we knew,Since DSifirmware has been udpated to V1.44,most of flashcart has been blocked.Yet,far as i knew,at present,just these two famous cards have been bypassed this block,they are dstwo and r4i gold 3ds.
It was said that r4i gold 3ds was the first card to be announced to work on DSi V1.44.The official has released a updated patch for users and you can download this updated patch here : R4iGold3DS_NDSiV144Patch.
In the wake of r4i gold 3ds,today,dstwo team released a newest updated patch for dstwo so that dstwo now can work well on dsi latest firmware too.You just need download the latest EOS V1.13 and updated patch and Find a DS console (NDS\DS\DSLite\DSi\3DS) which can run this EOS system.That's finish.You can download this updated patch here : DSTWO_v1.11_2012_0323 Updated patch
Note : never updated your console before updating your card.
I think,later more and more cards will join this list,maybe just the matter of time.