Link to edit a field in a record- Can this be done??

Link to edit a field in a record- Can this be done??

Hi All,

Just wanted to see if this is possible before I try developing it.  I have a event where I would like to email each contact (whose details I have in a contact form) containing a link that on clicking would confirm their attendence.  I suppose it would very similar to an unsubscribe link in a email you get from an online trader. If this is not possible, could the link direct them to a html view where they would pass their email address/name as a variable and clicking a button would update the event attendence status.  AT the moment the only thing I know I can probably do is send a link to a html view, where the user can submit their email address/name which would open a form where they could tick the attendence status check box and then submit it.  Seems a bit long winded so that is why I have asked about the previous options. Can anyone advise of what is and is not possible?

Thanks,

Johnny