Fan fiction is easy to create on a wiki:

Just add a new page, name it, and start typing. Pick your characters, set the scene, create some gritty CSI: NY-style dialogue, and let it flow... (Don't get too hung up on format. You can make it a script, a straight narrative, a Harlequin-style romance, whatever!)

Here are some great examples!

• Every Day is the Best Day of Your Life
• FanFic: The Proposal
• What have I done
• You Can See It In My Eyes /// ?
• look at me
• All That Matters
• Stay Awhile

Add a line NY style (Come play!)

• I forgot to say I love you
• Dreams Turn Into Reality part 1,2,&3
• A Wife, A Lover & A Dead Man