I have been using streamzoo for a small period of time now. I usually try out any Android photo sharing app that allows filters and all such effects to be applied to photos and thus at any point use a couple. Streamzoo seems to be the nicer of the lot. It has:

• a nice clean dashboard
• an ability to follow #streams (think of hash-tags) - the app does great work in this 'social' side of things. Streams can be followed and thus make for great sense.
• a set of small and sensible photo editing options including some good filters
• a small but sensible set of effects
• allows posting to Facebook, Twitter and Tumblr
• interesting photos crop up when you check out what is popular

So, is it "Instagram for Android" ? Unlikely. But it is better enough than all the others to be a contender and even a must-have Android app on its own.

What I miss

• an ability to upload only over WiFi as an option. I don't like to do uploads over 3G
• an ability to work offline. For example, use the app to click the photo, edit it, put it to the upload queue all without needing to get connected