I quite like Feed Wrangler paired with Reeder on my iPad and iPhone.
It could use a better website for desktop use, but there are a few apps like ReadKit that work well with it, and Reeder is supposed to eventually update it's Mac app with support for Feed Wrangler and other services.
I'm liking Feed Wrangler. It's brand spanking new, and it's geared towards letting other developers use their API to make apps. It's not as fully featured as others, and it costs $18 a year, but I'm liking the simplicity. Also it is WAY faster than some of the other RSS readers out there that are struggling with the waves of new users.
Probably. One new service (Feed Wrangler) has already been announced by developer David Smith. If it doesn't suck, I'm betting at least a few will add support for it if only because he's pretty well connected insider the community. I'm sure there will be others that come along too.
My only concern with Reeder is that the developer is somewhat notorious for taking a long time to release updates. So while I love Reeder, I might wind up using something else for a while.
I like Feed Wrangler as a backend a lot. On my iPhone, I use it with Reeder.
Unfortunately, Reeder has still not been updated on the iPad so I've resorted to using Feed Wrangler's own app there, which isn't all that good. It's also not been updated for the Mac, so I'm stuck using the also not-so-great website, though it can be made slightly prettier.
If you use Android, Press works great with it.
I've settled on Feed Wrangler, though the website's not all that great to look at. It does work great with iOS apps like Reeder, which is how I use RSS myself.
Digg's Reader might be a better fit for what you want.
I'm liking Feed Wrangler as of now. The iOS apps aren't great, but there's an API so other apps like Reeder are starting to support it.
Digg Reader works if you want something free, but it's pretty buggy and lacking in features as of now. There's also Feedly, though I'm not a fan of their apps (though, again, they have an API that other apps will start supporting).
Feed Wrangler is a new piece of software made by a developer I respect quite a bit. I have not tried it out yet, but it as gotten a lot of positive feedback in tech circles and reviews. The fact that it has an open API means that there may be a lot of other apps developed using it as a platform as well.
Anyway, downside is that it is 20 bucks a year, but depending on how much you rely on RSS for your workflow, that may be fair to you.