Picture Collage software

[TechLarry]

I'm looking for the best, most flexible, easy-to-use Collage software there is. I don't care if I have to purchase it.

I actually like Picasa, but it does not properly support 13 X 19 page sizes, a major omission if you ask me.

Thanks

 

[bigdogchris]

What about that new Windows Live photo editor?