The Lightning Jump Web Part is our Ajax keyword lookup web part that makes navigation to common areas around SharePoint really nice, easy and quick.
In the old version you could only lookup keywords within the site collection where the web part was being used. People came back to us and requested the ability to maintain a master list of keywords and be able to use that across the whole of SharePoint. This now works with the ability of 2 changes
1, The keyword list is a seperate feature that can be activated wherever you want your master list to be maintained
2, You can set the url for the web part to lookup the keywords in a specific place (another site collection, or even the SSP)
We’ve 2 screencasts of the web part in action over on the Lightning Jump Web Part page, go check em out!