Steve, our Passiflora is hardy in most winters although frosted last winter we get many seedlings underneath, I am happy to send you some if you send your address in a private message. They will flower in about 4 years and fruit, see my photo 15th. Oct. 2009. Plant your Morning glory this year and next as the Passiflora grows. I could send you enough for the 60ft. fence. Sending you a PM also.

As far as hardiness goes it does depend upon which passiflora you're looking at (and I suspect that you may be looking at an exotic).
The following link gives a fairly comprehensive list for both species and hybrids......

http://www.passiflora.it/temperatureminime.htm