Jobs only has so much time to send tersely worded emails.
Given Apple's recent explosion of products in the mobility space (iPod Touch, iPhone, iPad) and other low power devices (AppleTV overhaul, anyone?), it makes sense for them to snap up engineering talent and IP directly related to their products. Given the rumors that Intrinsity helped push the iPad's ARM chip from 650mhz to 1Ghz, Apple might have future plans regarding increasing the performance of low power chips in other devices such as the iPhone.