So, IBM has posted a good deal of information on programming the CELL chip.
http://www-128.ibm.com/developerworks/power/cell/
I’m sure only a handful of the people who have me on their watch list will be interested in this, but just looking at the main overview I’ve already found some encouraging information. They’re stating that as far as programming, it should appear just like 8-9 equivalently powerful processors. The only difference being that the main element is better at branching while the spes are better at pure linear calculations.