Don't we want or can implement quick links to any set database, e.g. BrickSet.com, to make linking set ids more handy?
I've just published a small Firefox search plugin for the same purpose.
I'm sure it's possible to implement (perhaps using the word filter), I'd certainly find it very helpful.
Something like this?
Links to set 5590 on Brickset and...
...links to the same set but on Bricklink. Linking to pieces would be helpful too.
I've added this feature to the BrickJax code that can be seen here:
This is also available as a greasemonkey/user script linked from the same page.