Yup. I have each of my three cars Fuelly feeds plugged into twitterfeed. You can even customize each one so they say something different for each car. Mine will say "Filled up T-Rex" or "Filled up the Miata" and then follow that with all the stats.
After wrestling with Facebook Connect for a while, we've decided to wait and see how their policies evolve. According to #8 at the FBC Policy Page, we can't post to your Facebook News Feed without popping up a window for you here every time you fuel-up so you can approve the feed item. That seems ridiculous and clumsy for everyone involved. The one ray of hope is that the page says, "This process is still being finalized. For now, you may not publish one line stories automatically." So this policy could change and we'd be back in business.
Until then, you can try out GrantHenninger's Twitterfeed hack, or import your Fuel-up Feed to your Facebook notes. I explained how to do that in the last comment in this thread. That works fairly well too.
If you look at that image, you'll see that there is a checkbox on the bottom left.
It wouldn't be a big deal for a user to click that one time if they don't want to see the facebook connect dialog again.. Also, keep in mind that you could make Facebook Connect completely optional to begin with.
ahh, I see, thanks for the pointer. That might not be too annoying, and yes, we'd only show it after someone explicitly approved Facebook Connect for Fuelly. I wish they'd mentioned that in their developer docs.
Yeah, they'd probably have a lot more sites using it if they did.
I personally like the popup on sites where I am commenting on a thread. For example, I may not want the comment published to facebook. Or, I already published a comment and don't want it to show up to Facebook twice.
However, on Fuelly I'd probably just click the check box and forget about it.