LinkedIn People Search: "It's People Alerts (via email), Stupid"
The new feature they should have highlighted more clearly is that you can now do People [Search] Alerts via Email. Save up to 3 searches for common keywords, job titles, company names, or other topic-specific searches, and get them emailed to your inbox on a weekly or monthly basis.
I do several of these types of searches via Google alerts for company- & product-specific searches on news & blogs. Now you can also do them for people on LinkedIn as well.