#1 If you use GFI receptacles instead of a GFI breaker, make the fridge receptacle the first one in the circuit. If you're doing more than a code minimum job, then you could make the fridge receptacle a separate circuit.
#2 I'm thinking you'll need a separate GFI receptacle. The AFCI has 30 ma of ground fault protection (way too high for people) and I don't see how it could be both 4 to 6 ma and 30 ma.
#3 Kitchen receptacles are not required to be AFCI protected. Receptacles serving counter top loads require GFI protection & the 30 ma provided by an AFCI is way too high.
To cut down on the number of AFCI's, install the minimum number of circuits to the areas that require the protection. The number of required general purpose lighting circuits (these serve receptacles too) are based on square footage, 600 sf for a 15 amp circuit and 800 sf for a 20 amp circuit. Be sure to check with your AHJ about this, some areas have more stringent requirements about the number of outlets on a circuit. Most small to medium size houses should be able to get by with 3 to 6 AFCI's, but you'll have to do a minimum circuit installation.
The 2011 NEC has not been voted on yet. I believe you have until October 23rd to make comments about the proposed changes.
