i haven't used logic yet ... was toying with the idea of getting it to re-wire into ableton, but now live 7 has sidechaining i think i'll stick with that (plus my bank balance is feeling the upgrade)
a couple of things to play around with:
try sidechain compression on your basslines (to your kick drum) - will give you a nice push and pull effect and leave room in the mix for your kick
get your head round your global midi groove/swing quantisation for an extra bit of funk
keep posting your stuff up i'd be interested to hear how you're getting on
