Pics would be great jawzney!
Linking two AI's has been discussed here:
http://www.hobiecat.com/community/viewtopic.php?t=7906
http://www.hobiecat.com/community/viewtopic.php?t=6481
I am waiting to see if Hobie release anything new later this year. If there is no tandem AI then I intend to purchase another AI and try a side by side conversion. Crossbar stress could be an issue but I'm sure it could be overcome.
I also intend upgrading our tandem with the sail and aka/ama's from the AI. I would have done this already but my daughters wedding at the end of this month has meant my tinkering is on hold at the moment.