I wonder what requirements and/or good practice are, does one create a new facebook ID for each app one makes and that posts info to facebook?

Yes, normally you have an ID for each - that's because it needs its own name. (Well, it doesn't NEED it as such, but each posts says "Posted by XYZ" - so if you have a game about Zombies and a game about Butterflies you wouldn't want those posting under the wrong name.

If you set up an app ID, like "Une.Ulvedal Studios", then you could use that to post for each app.

Make sense?

Peach :)

Thank you very much, makes perfect sense.
It is exciting and interesting to start as new user, but there also come up many stupid questions, try to minimize that with varying luck ;) happy this forum exists.