There isn't anything that says it does, but has anything been said about this possibility?
The scenario that brought this up was the idea of having your improved familiar use a wand of Mirror Image to buff the Wizard. With a range of "self" generally the wand user gets the benefit, but could the Familiar share it with his master?
No. The share spell feature is for spells that come from the wizard's actual casting not items, and not only that the feature also says the familiar is the receiver of the spells. There is no wording that says the caster is the recipient. When you use a wand the caster is consider to be the item for all purposes to include bypassing SR, and for resisting dispel magic as an example.