Quote From rewt:
Who reads conference abstracts .
This, lol, describes the majority of attendees. No worries, Tudor, as most people choose the panel of the theme they're interested in and don't bother reading the abstracts, they'll just be familiar with your name/title/association. Most don't even bother reading the paper that some organisations make you put up. But PM's advice is good, I've done that as well, just a brief sentence. The abstracts may be archived online for a bit, but nobody will every go back and read it.
Put an updated one on your academia page if you want and that is what will stick with recruiters when/if they look up your presentation experience. (Although, I personally don't put the presentation papers or abstracts up on academia unless they are enroute for publishing)