Where to buy fast ceramic resonators

[Darrel Taylor]

Hmm, i think you might have to explain that one too me.

Which part?

Also, how come my 24MHz resonators work fine with a 18F?

Because 18F's oscillate just fine up to 25mhz.

I thought PICs ran instructions at a quarter of the speed of the resonator

They Do.
But you seem to be missing the 4xPLL part.
Are you familiar with the 4xPLL?

The resonators i use dont need external capacitors (they are the 3 pin ones). Do i need to use a 2 pin one with caps?

That is simply my suggestion.
Do your development with a crystal.
When it's all working perfectly with the crystal, test it with a resonator while varying the ambient temperature to the furthest extremes you can or really need.

If everything still works, you should be OK to uses resonators for a production run.
add: If not, you can make allowances for the deviations from "nominal".

But having timing related problems that you can't find in the program, while you're trying to program it, really sucks.

Use a crystal.