Hi,
I've got a Blizzard in my Amiga 1200 Tower case ('040@25Mhz). As for the fan problem, well I mounted a pc cpu fan (pentium one I think) over the Blizzard card, via a strip of metal plate. Basically one of those pci slot covers, drilled a few holds in it, screwed the fan to one end, the other to the chassis. Everything seems to work fine, had it running for hours without any problems.
Personnally I think my 1200T is going to be religated to the "museum", and I'll buy myself a spanking new G4 AmigaOne when OS 4 comes out. After all I can only hack my 1200 so far! :-D