According to a recent announcement by Brandon at zathyrus, it looks like zIFboards (formerly Invisionfree) has been acquired by Tapatalk. In light of this users of InvisionFree will be given 2 options:
1- "Upgrade" to Zetaboards
2- "Upgrade" to Tapatalk's new forum system (seems likely based off phpbb)
This, in short, means InvisionFree is getting killed off. If you have an IF board now, you might want to either get a copy of the database while you can to convert over to JFH (or another software) or at least start backing up your essential stuff for the inevitable transfer or loss of the data.