i don't know much about the chip but it could be posible to program the chip to do those things (don't know if its supported native on the chip or if one would have to modify it)
~Cant wait for that!
Ummmm... where do i start:
try programing some sick tricks combos in the Skate3 demo
for a first person shooter try the Call of Duty:World at War (any game with semiauto guns will work) and try some rapid fire (try to time them to make guns semi-auto guns function like automatics), i have an idea for NaziZombies
try to program some Combos Dante's Inferno/Dynasty Warriors (you said Armored Core so they have a Gundam one if you like to mech games)
You could see how far you could program a GuitarHero song to play perfect (helpful if you like getting 100% on songs but there is just that one tricky part)
try some combos on some arcade fighter games Naruto/Dragonballz/UFC(realy arnt my type of games these are ones i seen skiming the store)
... Just try to find some demos for games that have button combos in them that would be benifical to the modchip because they are tedious...