Sounds great, but these 3rd-party apps are designed to use the Reddit API, so I don't see how they could be made to quickly use any other service unless they just throw up a big banner saying "We can't use Reddit any more because they've closed their API to us, so we recommend you try out $service instead! Sorry, but this app isn't written for $service's API, so you'll just have to navigate there with your web browser."
It would probably take a fair amount of time to make new versions of these apps for a different service's API.