Stephen Downes

Robin Good offers an interesting concept. "Differently than DLAs, PMAs are not centered around your personal life. While Marc Canter envisioned tools that would have allowed the easy recording, management and access to personal image libraries, music, clips, preferred feeds and more, PMAs are centered around a product, a service, a company, a celebrity. PMAs bring together the different communication and interaction modes we have recently started using, allowing instant vertical communities to be rapidly created around them."