Hi Worddigger!
Nice effect! Here is an effect idea that I nicked one of from Irishmarks party movies last year.
Software called "morpheus" is custom built for this kind of stuff. Just export two stills from your vid, morph them with morpheus and then re-insert to your timeline.
Heres the link for the software -
http://www.morpheussoftware.net/
Well worth it I thought
And heres an example of me using it @ 44secs into this movie -
http://media.putfile.com/Jills-birthday-dive
Purpleturtle