Thanks for the info, I had no intention of opening it but I was curious to know about it.
In any case, the only email program I'm using is kmail, a text only program on a linux box and I'd have to think hard before going to the trouble of opening any legitamate attachments that require Windows, be bothered with emails that contain HTML, etc.
As for viruses and worms, I suspect I've been sent another one this morning. It arrived with the subject heading "hello jonbanjo, some questions" from someone in a newsgroup I've recently had some email correspondence with. Again it contained strange attachments. I've just sent him an email informing him.
Jon