If I used Flickr for photo storage, I might consider leaving, however, I have hard drives for that. I use Flickr for the community, and until some other site even begins to approach the number of talented photographers that Flickr's userbase has, I have no intention of bailing.
This is what many implementers of photo sharing sites don't get. (I didn't get it myself for a few years.) Flickr is a social network for photography enthusiasts. Just because another site puts photos on a web page doesn't mean it's a competitor. Especially Snapjoy, since automatic organization by date is more for pictures that tell your life story than for pictures that show your portfolio.