Looks like Twitter and LinkedIn's relationship is deader than Tom Cruise and Katie Holmes' marriage. Seems the popular micro-blogging service has barred the partner from displaying Tweets on its user profiles.

It's kind of sad — the move puts a period on the end of the 2½-year partnership, which was a fruitful one for LinkedIn. With those short blasts of 140-character messages populating the site, it helped flesh out member content and kept things fresh for site visitors, which likely encouraged return visits.

Alas, it wasn't meant to last. To take this relationship analogy even further, the old "It's not you, it's me" break-up line kind of applies here. According to Michael Sippey, the company's consumer product chief, Twitter has a new attitude about sharing Tweets in general: He writes on its developer blog that the organization is focusing on providing a "core Twitter consumption experience through a consistent set of products and tools." Toward this end, Twitter — which has been disallowing third parties from showing Tweets in the mobile realm — seems to be taking things to the larger webs now. So indeed, it's not just LinkedIn (although this is probably the most evident example).

Having said that, it doesn't mean messages originating from LinkedIn won't be allowed on Twitter. Theoretically, users will still be able to Tweet FROM there and have it show up in their Twitter stream. The relationship just won't be a two-way street.

[via Business Insider, image via Flickr/Nan Palmero]