In an Intel Software Network article titled Parallel computing: disappearing from CS curricula???, Michael Wrinn demonstrated that parallel computing has gradually disappeared from popular CS curricula in the past 10+ years. His first example is:
[...] a panelist at IPDPS (in Miami, a couple of weeks ago) assert that parallel-processing topics have been disappearing from CS curricula in recent years. As anecdotal evidence, he pointed out the topic’s removal in the 2nd edition of Introduction to Algorithms [...]
The article goes on to give several other examples to prove his point. In the end, Michael wrote
[...] multicore computing platforms are now the norm. Recognizing that reality, let’s make the adjustment time short.
Are we expecting a surge of algorithm and data structure textbooks with an emphasis in multicore? 
22:18 on May 5th, 2008
Tom Cormen explained this decision:
http://geomblog.blogspot.com/2007/08/parallel-algorithms-resurgence.html