Geo: You have no idea of the power of Haste do you?
Ferret: +5 movement sounds good, no other familiars grant it, and it is not as overpowered as <snicker> Haste 1/day. It is infact, quite comparable to the other familiars granted abilities. I.e: if it is more powerful than a weak non-epic feat, then it's to good.
By the way, should a turtle familiar grant a swim speed or +1 natural armor?
Later,