I'd like that. But how does it work exactly? I've had a quick look round, but it doesn't seem to be a bulletin board in the same way TrekBBS is. There's categories and judgings and all sorts going on - I'm a bit intimidated.
AdAstra is an archive. http://www.adastrafanfic.com/
Here you post your stories and people read and review them.
There is also AdAstra forum. http://forums.adastrafanfic.com/
You don't post your stories here, but you interact with other writers from AdAstra. Some sections are not available for non-registered, but you can take a look to see what the forum is about and how different from the archive.
As for judging, it's only about technical matters: grammar, spelling, etc. The content is not judged, because the owner wants the archive to be open to all sorts of stories, so that everyone can find something interesting to read.
I say give it a try