@doublec: Didn't have a look at the sources. I remember vinced reduced the number of possible randomized IRC channel names for bootstrapping on namecoin. Perhaps we have a similar problem with i0coind. The number of possible IRC channels might be too much for a few nodes on testnet.
I don't bother with 'official' testnets. I create my own isolated test networks by not connecting to irc, dns, etc and manually bring up nodes connected to each other. It makes it easier to control.
Thank you for your feedback. Can anybody confirm if or if not there is an "official" testnet for i0coin? If yes could you please provide IP addresses of seed nodes? Would be greatly appreciated.