Sad as it may be, Invision for mIRC is officially dead.
I see no reason to assume otherwise.
No amount of being "busy" would prevent an update for such a long period of time.
If anyone is looking for a great alternative, NNScript (edit) is by far one of the better scripts I've seen for mIRC.
I do miss the simplicity of Invision, but the fear of corrupt settings does not lurk in NNScript, despite claims of it being fixed in Invision.
Also, NNScript 4.0, the long-awaited release that will put all other scripts to shame, will be released before the end of January '06. The screenshot previews are secksy.
cRYOa: Whatever the reasons, just know that what you've created thus far is a script that won't be forgotten, hopefully even modeled after in the future.