Hi Jarno
When a title parameter is added to a tag most browsers will render it as a tooltip when the mouse is hovered over it. So there's a neat (if possibly annoying) feature of it. Furthermore some CMS applications like to flag everything up with a title when they are shown in Edit mode as content blocks.
When it comes to SEO I'm not aware of it being used by Google for anything other than an IMG or A tag. Happy to be proven wrong though!
Rich
