Hi April and Julie
Yes, you can use photobucket, flickr, or any similar site. I usually resize my layout to 600 x 600 and attach the link to the PM. If you have any trouble, just let us know and someone will walk you through!
Thanks for participating - it will be so cool when you see the end reveal and see how the layouts evolve. By the time it gets to the last scrapper, it rarely looks like the original layout but you can see the transitions from layout to layout!!