data sharing cross SharePoint sites

Recently there is a disucssion on how to share data cross sharepoint sites in the LikedIn SharePont user group. A lot people joined and shared ideas. I find a need to summary them up here as a reminder to myself.

1) OOB solutions:

• Page view : this link any data, interanl or external sharepoint


• CQWP


• DVWP


• List View: I feel this is best option, see my post http://sharepointlink.blogspot.com/2009/03/share-document-library-among-different.html

2) recommeded 3rd party adds-on:

• Coarseworks


• LightingTools


• CodePlex (lookup cross sites)

3) customization:

• roll-up web part


• Search service and search result web part, xsl

However, most of above apply to sites in a same collection. There is very limited options when trying to sharing data cross site collections, which indicates to me anothe point: when designing sharepont taxonomy, data shareing is a very import factor behind sizing and security.