Which is better?
Long story, or several short stories with the same characters?
I already have a start of over 3k words, but would like to do more with these characters.
What is the limit on length? Is it 10k?
Clum's answer was excellent, but I thought I'd jump in too.
I've got one piece (prologue and chapter 1 are posted on my page) that is episodic. More chapters are on the way, and it involves two (and in later installments more) people engaged in a rather lengthy sexual encounter whilst telling each other stories about their sex-lives in times past, so there is a long continuing story, and a shorter story hidden within each one.
I have another project which is quite lengthy, I think about 17,000 words now (not posted) that I'm not remotely sure how I would break down. If you have a really long story, my advice is to leave something to wonder about at the end of each chapter, because going back over mine, I can't find a single damn spot to break it down to a postable length. With that said, let me recognize Clum's answer as excellently concise and well presented again before I sign off.