Generally, white smoke means coolant getting into the combustion chamber due to a blown head gasket. However, I'm not sure why it would be only on hard acceleration. I'd think that would be the least likely time for water to get in due to the high combustion chamber pressure.
To be on the safe side, I'd keep a sharp eye on the coolant level and the temp gauge. Hopefully, it's just a residual of the seafoam.
In case it's oil, I'd keep a sharp eye on the oil level as well.
If it's a serious problem, it will reveal itself soon enough.