Remember folks you can do the 1 exam route to CCNA, or two exam route (ICND1 and ICND2)
ICND1 was changed sept last year, it has been reshaped and contains a lot more relevant stuff (some that was in ICND2 previously, IE the upgrade exam to CCNA)
So ICND1 contains more in depth relevant topics, they have taken out what is not needed, they have put in some new switching stuff, touching base on layer3 switching, more routing, routing protocols, OSPF, EIGRP etc and much more.
ICND2 is pretty much ICND1, but a dig down deeper in to the topics with some additional stuff so you know much much more about them, and be able to debug and pick your network to bits kind of thing.