I use Acekard 2i, The Acekard team are working on making it work on 1.4 FW.
Acekard 2i works extremely well on my dsi and is very customizable which I like, i've not found any problems like Roms not working or crashing etc..
Highly recommend it
Can anyone tell me an OS X alternative to CheatUp? I know I can download them off the site, but I'd like to be able to use a program instead
Sorry if this is in the wrong section and many thanks in advance.