I had a bit of trouble with login issues (I signed up awhile back) since they recently updated their login system, but it all seems to be working fine now. They don’t have a bulk uploader or iPhoto exporter yet, but once they do, I may just blast a thousand or more photos into the system. For now I just have a few photos I manipulated a bit. Uploading 10 at a time is not a lot of fun.
I definitely think Zooomr could compete with Flickr and the other photo sharing services out there. It’ll be interesting to see what features they implement in the future to set themselves apart.