Is driverguide planning on supporting Amiga OS4.0 when it reaches realease stage?
Does driverguide not support Amiga OS previous releases? Having had a quick search under the keyword AMIGA I found nothing. Surely the idea of this site is to centralise driver storage - especially for the hard-to-find hardware and less-supported operating systems.

If anyone is interested I can upload lots of Blizzard PPC firmware, device drivers, etc

I doubt there will be any Amiga forums opened in this support forum. In 4 years I've never even seen any requests for Amiga os on this site. This site primarily supports Windows os's.
If you really want Amiga support you need to look for Amiga support forums.

So i guess this means you have 2 requests now ;)