I've been inactive quite some time, mainly because I'did not blog much...
This add-on will attach a tooltip to all battle.net links found on the sites that include it. Very much like the tooltip library provided by wowhead, but mine is using the official API.
But since demos say more than a thousand words, just take a look for yourself: http://dev.dsitc.de/demos/wow-data-tooltip/
Feel free to use this library on your blogs and don't hesitate to drop me a line should you need help.