Now, by 'newer' you're not implying DSi specific games? As that currently hasn't been 'hacked' (or w/e the term is). As for the OFFICIAL Acekard team, I would be abit concerned about, if the AKAIO team were to quit... it took them about a month to reply to one of my 6-word emails... but I'm quite new to them, so maybe they actually will be reliable, if AKAIO team quits?
EDIT: Nevermind, see that you want a new cart... and R4 isn't new.