callivert - 5:02 am on Jul 27, 2009 (gmt 0)
my guess is that you will lose valuable links.
How much this will hurt will probably depend on if they're a part of an overall strong link profile or not.
But surely anyone with old Geocities links pointing to them has an aged, authority site and not much to worry about. maybe you need to think of your Geocity links as booster rockets. They got you this far... but now they're being ejected and falling away.