Here’s the latest action:

Google Health lets you share profiles — With this feature, users can invite family members, doctors, and other trusted folks to view their medical records and personal health information.

Oodle launches new version of Facebook marketplace —  Inside Facebook describes the new marketplace as more social and conversational. Facebook announced it was handing its classifieds service to Oodle in December.

Why Intel will let TSMC make its Atom processors
— Intel’s deal with the Taiwanese manufacturer is the first time the famed chip maker is giving another company access to its chip cores. Fortune’s Jon Fortt says Intel needs TSMC to become more flexible.

PC shipments to see the steepest decline in history — Gartner predicts PC shipments will fall 11.9 percent in 2009, beating 2001’s decline of 3.2 percent (the previous record).

LinkedIn founder has thoughts on fixing the economy — Under the awful-yet-irresistible headline of “Stimulus 2.0,” Reid Hoffman suggests the federal government offer small business loans, abolish the limit on H-1B visas, and match funds for venture capital and angel investors.

Chat expands on iGoogle
— Google was testing the feature among a small number of users of its personalized homepage, and it started rolling out a bigger test earlier this week.