NOTE: This is an old post - a running Web3270 instance is no longer available.
As part of the hosted Hercules project (http://www.open-bpm.org/index.php/hercules.html) I have finally come up from the rabbit hole of creating a Web front end to s3270. Took much longer than I expected and became rather boring!
It is feature complete (but not issue free!). Anyway I have put a standalone version up pointing to the free DeZhi Mainframe.
I can now continue to finish up the other stages of the hosting project - and hopefully I will soon actually use it to code on MVS ...
I have a long list of broken promises (apologies) - now I have come up for air I do hope to start making progress on other things.