Back in June I posted my fictitious announcement about the merger of LinkedIn and Twitter, Twinked-In. If these two companies expand upon their relationship ... this is definitely a situation where the sum of the collective parts will be greater than the "former" whole. Here's an article from Mashable explaining their new relationship. One interesting sidebar ... some corporate firewalls bar Twitter, but not LinkedIn. Think about the implications. Twitter is now on the inside.
(Instructions from LinkedIn on how their relationship with Twitter works)