Do we need a Happily Ever After?

Kissed by Venus has an interesting post about the over-representation of the romance genre in lesbian fiction, and about the domination of the Happily Ever After ending in lesbian fiction.

What do you look for in lesbian fiction? Do you need a happy ending?

What makes something a lesbian book? How much lesbian content does it need?

Is there something to be said for happy endings when not long ago all queer books were required to end unhappily?