On March 18th 2001, Warunee (co-founder and former co-admin) wrote on NS the following:
We have over 150 stories. Yes, we’re proud to say that we have the largest Chlex fanfic archive on the net.
Think of that, 150 stories. Now the entire fanfiction category on the forums contains (in written moment) 1600 stories (including the 457 currently in the graveyard)! Not bad! The oldest fanfiction posted by an user, that I could find, is Catheryne‘s Gotham: For One Kiss. (PG, Romance). It was posted on March 2nd, 2003 and is now archived in the Completed Romance section.
The beginning of Gotham: For One Kiss
i. Cold Grey Night
The blonde woman was unused to the freezing temperature. She huddled lower under her thick coat, shivering against the biting air of the dark city. She hurried down the street, desperately seeking for a warm stopover before continuing on her pointless wandering.
Chloe Sullivan lit up at the sight of a blinking sign that was so old that it flickered sporadically, hung dangerously at one end, and now only read C FF EHOU E. Despite the dubious appearance of the shop, Chloe needed her fix too badly to care. She hurried over to the establishment and looked down at the door handle. Grimy. She cringed. She would not have been the reporter that she had become if she would let possibly fatal germs bring her down though. She closed her gloved hand over it, mentally swearing to throw out the gloves before even stepping back into her newly leased very ancient apartment.
When she entered the shop, all eyes turned to her. She felt each of the customers look her over, weigh her really, without even turning their heads. It made her feel so uncomfortable, the way they measured her from the corners of their eyes, as though she were not even worthy enough of a full on appraisal. The coldness that made her shiver now had nothing to do with the weather, although it was even colder in here than it was out there if it were possible.
You can read the entire story on NS Forums – Gotham: For One Kiss.