Actually I'm not in favor of paid-for-development clients But as far as I could see, your clients are already open source, so bounties for conversion are always ok

I would be happy to see a second application to use mintcoinj library as well as android wallet, it'll make the library stronger and will cause bugs to be found & fixed.

You should note that mintcoinj is not as lightweight as POW-only coins' Simple Payment Verification libraries. For POS security to be trustable, entire blockchain needs to be downloaded (but it will be much lighter than official client for sure, regarding both storage and CPU, but not bandwidth. Also hopefully android app will use some tricks and users won't have to download entire blockchain (bandwidth wise), but a pre-processed blockchain database file instead. You would have to embed similar measures for users to be happy)