I remember two related discussions..
There was some info about 3rd party bridge makers (Marvell and Mai ..
I think) being interested on making Bridge/controller chips for IBM
970 (mac slang G5)
And there is a bit newer comment by BBRV that Genesi intends to make
970 based system (Pegasos 3) early next year. (sounds likely that it'd
might use this chip then)
Beoynd those.. not much info of this
Ah well there are also Rumours (or 3rd party info) of Marvell
Discovery 3 chip. But (with what little info is publicly
available() it's essentially Discovery 2 with faster G3/G4 bus, so
it's not too interesting in this.