According to the latest roadmap, Intel will enable the Camino Boards (to be released in September) to use PC 100 SDRAM.
As the developpers face various problems with the implementation of RAMBUS due to the frequencies, Intel will allow riser cards to be plugged into the RIMM sockets. On these cards SDRAM modules can still be used.
To enable SDRAM to work on these riser cards a MTH (memory transformer hub) will be added to this adapter. There is no information on pricing so far.
The problems like availability, stability and pricing (An increase of the main memory costs RAMBUS vs SDRAM of 30 up to 50% can be expected) can be solved by stepping back via this card.