That Macworld article is nice.
This one at Ars Technica also goes into the (quasi-Optimus) graphics:
Inside Apple's automatic graphics switchingAnd some early benchmark comparisons (Core 2 Duo versus Core i7):
Benchmarks show Core i7 MacBook Pros offer 50% speed boost[the original benchmark article is from Gizmodo, but both they and Engadget have such bloated pages, i prefer not to link there.]