I'm sorry to say that imm.io is officially shutdown. It's been a long time coming, frequent users of the service have noticed that we haven't put a whole lot of love into it.
We simply have not had the time to keep the service up the quality that we, and our users expect. If you can't do something right it's better to not do them at all.
All hope is not lost, there are plenty of services on the internet that scratches the same itch.
So Long, and Thanks For all the Fish Pixlr Team