. G5's will launch at the WWDC (not any earlier) - apparently all models as dual systems. Configurations:

Base: 1.8 GHz Dual - $1,999 (currently 1.6 GHz single at $1,799)
Mid: 2.4 GHz Dual - $2,499 (currently 1.8 GHz Dual at $2,499)
High: 3.0 GHz Dual - $2,999 (currently 2.0 GHz Dual at $2,999)

The base system will begin shipping immediately, while the mid-range configuration will not be launching until mid-July. The high-end system will not be shipping until late July/early August - or whenever the IBM stockpile reaches enough to meet demand... Of course Steve will say "... and the Dual 3.0 GHz PowerMac's will be shipping in one month."
this is a quote from a user comment on:
http://www.insanely-great.com/news.php?id=3459

All rumours are not verified.
I get no preview from apple of any future products.
I know about them the day apple releases them