I've worked with a few, but it only worked twice.
About a month after getting ZZT, I worked with TGoddard/Interfecus for a few days on his Dragonball Z parody. He got really interested in the programming language. In fact, he liked it so much that had the thing had variables he'd probably still be in ZZT today. He actually tried really hard to develop more advanced ways to use the flags for memory purposes, though I don't think he ever came up with anything that the ZZT Encyclopaedia doesn't include.
His friend Gareth (WHO LOOKS AND BEHAVES EXACTLY LIKE NADIR) showed some interest in it when I showed him and a female friend some ZZT games, beginning (being in a drac0 fanboi-phase) with
Edible Vomit and
Teen Priest II. After I read out the sequence in which Freddy returns the teddy bear to the dead little boy, she actually began crying. She reacted with less affection to the skullfucking scene in the latter game.
Garfunkle worked with BoonoB for a while before he met me, under the name Belch. Some of BoonoB's earlier unreleased work, including a Harry Potter spinoff and a Chickenwire-type game called
Prozac, has him in the credits. I don't think Garfunkle ever really learnt the ropes of the actual game, though, and after a series of embarrassments after arriving in the community he gave up for good. The last I heard of him he was writing pseudo-gothic poetry ... and winning prizes for it at school. LOOK WHAT YOU ALL DID TO HIM
BoonoB, of course, is the only one of them who ever showed enduring interest in the game, and the only ZZTer with whom I've ever been content to work on an equal basis (that is, not just me submitting music or a couple of art boards, but making games together).
Parallel was written while he and I both still lived in New Zealand, and
Parallel BK when he visited me from Australia. We now both live in Australia, but in different cities. We were planning to make a final version of
Parallel about a year ago, but seeing as he said he'd "lost interest in ZZT completely" after handing me the ZZTV project, I don't think that'll eventuate.
Aside from a few boards in the last instalment of ZZTV, he hasn't released anything else he made. Most of it, since his computer died and I foolishly erased my old computer, is probably lost forever. I may have some stuff on disk somewhere.
Nowadays, of course, I'm all by myself, but I've written music (some unreleased) for BoonoB, Commodore, Dr. Dos, sumisusan, and Zenith Nadir. I also just gave a couple of art boards to Dr. Dos for
Aura.
I HOPE YOU ARE HAPPY