I was thinking just for Amiga Explorer so I could use my laptop instead of setting up a second PC next to my Amiga 2000. I can get one for ~$5 on eBay. Might be worth a shot once my Indivision and keyboard adapter come in.
good luck, I think you'll also need a MAX3232 serial conversion circuit to go from 12V to 5v.
also. it absolutely will not work with Amiga Explorer
http://www.amigaforever.com/kb/13-105Oh, I read Indivision and got all excited... OK, the ECS

I forgot to mention, if you get that working, you may be able to use my program without flow control. I'd have to add that as an option.
http://www.amiga.org/forums/showpost.php?p=681242&postcount=6