We'll see what the final bill comes to, but honestly - the spill was our fault. Not charging us for labour, not voiding our warranty, and possibly covering the parts too? That's more than acceptable.
Update:
We dropped the notebook off yesterday and were told that it would take up to 3 business days ... Apple called this afternoon, almost 24 hours after we dropped it off, to say that the repair has been done and we can pick up the notebook anytime. Total cost: $84, labour covered under warranty.