Use the wiki to bring in the lurkers

Often during my meetings with Euan Semple he refers to corporate intranets as "knowledge coffins". This is pertinent as one of my worries about the intranet that I manage is that, though I can see numerous items of fresh content posted each week, I am far from convinced that anyone is reading it!

I see enterprise strength wiki integration as a major way to address this and reinvigorate the intranet. Notification features such as granular Watch, E-mail Notification, and of course RSS, features of enterprise wiki offerings like Socialtext and Atlassian's Confluence will draw a regular audience into the wiki, and, just perhaps, the legacy intranet content via hyper-links.

This new crowd of active and frequent lurkers boost the ROI by consuming, and hopefully acting on, the wealth of business knowledge that the weekly posters so diligently supply.

To boost this effect, I would love to find a way to integrate the wiki's built-in search and labels (tag cloud) such that it returns relevant documents from the legacy intranet in addition to wiki pages. The converse of this would be to also have the intranet search include wiki pages.

Does anyone have experience of integrating wikis and legacy intranets in this way? I look forward to hearing your comments.