Agree that contextual is not the right word, we're talking about semantic web still. Regardless of how effective they are, plugins are fine for early adopters, that's about it. Ubiquity is going to be great, kind of like moving Spotlight to the web. - Dave Evans from FriendFeed MT Plugin

Excellent article. One minor suggestion, search can be filtered based on context...so sort of limiting to say context can bypass search. @Alan - Contextual relevance can be achieved when we can infer intent of the user. And we all know how notoriously difficult it is to infer intent of humans. This is not a trivial problem, hence the lack of full-blown applications and experiences. However the pieces are falling in place and like any complex technology it is by many false starts we truly make progress. @Leadsexplorer - Google wont be replaced. In fact they can provide more targetted results by using context. @Todd - Location is indeed a key contextual factor @Ken - You bring up a valid point. People determine relevance not machines. However there are limited use cases where machines can simplify determining contextual relevance. One factor that needs to be emphasized is this. Once contextual relevance is established the sum of actions that can be layered on them is where effort needs to be spent. - Mahesh CR from FriendFeed MT Plugin