Tateline was the worst chat program ever. Well, not really, but text scrolling was a huge issue in the earliest versions, and development ceased soon after a proof of concept was done.
Two things contributed to the abandonment of this project:
However, that being said, it did sport one unique feature- it was the only client for its protocol that ran on 68K macs without OpenTransport.
There's no download for this program. But beware, the program may eventually make a comeback as Tateline ][ : Son of Tateline.