Hey there Paul!
Yes...you can do latte art with Chai. The Oregon Chi super concentrate acts similar (minus the crema) to espresso. I have found it works really well and is about the only chai I have been able to pour a rosetta in. Let me know and I will send you some to practice with.
YEs! awesome question... Ive done it before, but you can only see it when you look at it from a certain angle. Its like secret latte art. James bond sh*t... ok maybe not