Another current trend is for recruiters at aggressive companies to actively reach out to potential candidates via Linkedin and other similar sites. The big ones, like Google, even have specialized tools to collect info on various forums (such as this one, I'm sure).
This puts startups at a disadvantage, because candidates won't know to seek us out, and fewer candidates are using job boards to find employment. So we need to work hard to 'get the word out' that we are hiring.
Here's an example of getting the word out: Solum (http://solum.ag) is a Precision Agriculture startup helping make the business of farming more efficient. We're hiring Data Engineers, Software and Web Developers, QA Engineers, and Designers. Interested? Send an email to jobs@solumtech.com
Make sure you use "high demand" keywords in your resume as robots are scanning these will pull it up for employers/recruiters.