Even though I use the Akismet-Contact-Form I still get spam and a lot of people registering for my blog with .ru email addresses. Why?!
Well, if you have a have to have a verified OpenID to send me an email, I might see less spam... maybe.
In any case, coupled with wp-openid-trustme, certain posters would have the unfettered ability to send me links, attachments and all the goodies that make email awesome -- BUT, I wouldn't have to worry about evil spammers junking up my inbox, since I'd be able to raise and lower access per-OpenID...!
Bonus feature: Every OpenID automagically gets an OAuth key that can be used to send me remote messages from remote applications. These "OAuth Contact Keys" (or whatever you want to call them) could be used to verify email senders... a straightforward and unified way to authorize people to contact me!
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