Now that I’ve switched everything I can to GMail

I love the tagging via labels – very useful.  What would be really cool is the ability to attach a note to an existing email – something to remind me of the email – why it’s important, whatever. 

For instance, I just got a “Welcome” email from a new web site. I would love to be able to attach a note as to why I thought they were interesting, a hint to my logon/password, whatever.  And index it.  Make is searchable based on search string, labels, etc.