Bonding and grounding are distinct and different ideas.

Bonding, properly done, creates an equipotential zone in which it is not possible for an uninsulated location to be at a different voltage from another location within that zone. No voltage difference = no potential for an electrical shock. See http://en.wikipedia.org/wiki/Electrical_bonding for a fuller -- if not completely accurate -- explanation.

Grounding involves tying one pole of an AC or DC circuit to the ground or earth. (Grounding is called "earthing" in UK-speak.) Grounding the external case of a motor, tool or other device eliminated the possibility of a voltage difference between the ground you're standing on, and the case of the tool you're working with. Explaining this more fully, and explaining the relationship between a "ground" and the "neutral" is somewhat difficult without getting into AC transformer wiring.

But here are some important points:

1. Both bonds and grounds fail if connections aren't maintained

2. Some allowed NEC methods are, in field practice, very likely to fail.
I personally hate conduit ground (grounds maintained via metal conduit, rather than by a separate wire) because if the conduit gets loose, the ground circuit is broken. I've been badly shocked by equipment that had a 'conduit ground'. Likewise, interrupted pool bond that uses the rebar or some other metal pool element as a primary path for the bonding circuit WILL fail in some pools.

3. I'm not sure what the current situation is, but in the past, the NEC *allowed*, but did not *require*, that the bonding circuit be tied to the grounding circuit. In actual fact, because inground pool pumps are both grounded and bonded, the bonding is grounded, at a minimum, via the pump motor case.
My recommendation is to (a) install un-interuppted bonding, that does not depend on any pool element to complete the circuit, (b) a fully wired ground to and from all exterior electrical panels, (c) a full driven ground rod at each pool panel, and (d) a wired connection between the panel ground and the bonding circuit.

4. But, it's not practical to tie the ground system to the bond field on AG pools using a double insulated pump, and serviced by a 2 wire feeder protected by a GFCI. In this case -- which I understand to be YOUR case -- I would recommend installing a full driven ground rod immediately adjacent to the pool, preferably in the dampest location around the pool, and tying the bonding wire to that ground rod.