hi all

Is there a way, that member1 can post images into the album of member2?

I would not make sense that every member needs to open-up a new album for let's say "your best holiday picture".
Everybody should be able to submit that to only one album.

Any idea how to do that?

You should use categories if you want all members uploading to the same container. Albums are specific to the member who created them (at this time).

Ah no...
I did use categories as far as possible... more would make the gallery messy.
Hopefully, you'll consider that option in your next release.

It's definitely one on the drawing board, along with the ability to configure who can submit to the albums (i.e. "let anyone upload to my album", "let my friends upload to my album", "only let my friends see my album", etc.)

sounds great!
looking forward to the next release!