No rumor, but confirmation right away. Also Japan will receive its 40GB PS3 SKU, as announced by Sony Computer Entertainment, according to Famitsu and Dengekionline today.
The 20GB and 60GB consoles will get a pricedrop on 17 October and the 40GB SKU will be introduced on 11 November, also...without Backward Compatibility, but included the rumble controller. Two colors will be available, clear black (same as the 60GB model) and ceramic white.
As far as I can take from the context of the text, no discontinuance of the 20GB / 60GB... but my guts tells me it will.
http://www.dengekionline.com/data/news/2007/10/9/ce69bd8b30dcac80c08e1f0062d99541.html
http://www.famitsu.com/game/news/1211062_1124.html
PLAYSTATION®3 is the future.....NOW.......B_E_L_I_E_V_E
Supporter of PlayStation and Nintendo