Personally, I like to add relevant links to the questions/answers I provide. Usually these are simple links to API documentation, or wikipedia articles.
Following the SE motto of "making the internet a better place", and trying to provide as useful/reusable answers/questions as possible I feel adding links should be promoted. Adding links makes terminology less ambiguous, prevents users from having to 'copy/paste-google', and indicates effort.
Couldn't a badge (or three) be awarded when you added a certain amount of links to your posts? To prevent gaming the system, only up voted posts would count towards this amount, and down voted posts could actually subtract the amount.
I am aware of link rot which could be a problem. To address this I wrote the following suggestion, which basically comes down to custom social bookmarking integrated into SE per sub-site.