We took a look at Cameringo a couple days ago, and the one issue we had was that sharing intents didn't work. Thankfully the developer has made a couple updates in the last day, fixing a few issues including sharing. We've gone through version 1.1 and 1.2 in the last 24 hours, and both have brought notable updates. 1.1 brought improved rendering on HTC devices and other internal improvements, and 1.2 fixed the sharing bug. The developer has been quick to respond to bug reports and get these fixes out quickly, which is great to see.
The end result is that Cameringo's UI has improved notably. Gone is the legacy menu key, and the UI elements to control settings and to capture photos are now transparent, giving you a full-screen viewfinder. When taking a shot you can now properly share that image to any available app, and the picture will actually come along.
As we said in our initial look at the app, it has a lot of great things about it that make it worth the $1.00 to purchase. Now with these improvements and bug fixes it's really a no-brainer if you're looking to add filters to your photos.