What Instructional Designers Do and eLearning Certifications

Came across this great post that explains what is instructional design and what do instructional designers do in simple terms. The post Is this instructional design? explains:

Instructional design is the process of identifying the skills, knowledge, information and attitude gaps of a targeted audience and creating or selecting learning experiences that close this gap, based on instructional theory and best practices from the field. Ideally, workplace learning improves employee productivity and value and enhances self-directed learning.

And recently Tony Karrer compiled a great list of elearning certifications and other blog posts that discuss instructional design.