Is there posible to get pms rss feed

A PMS feed? That time of the month?

Anyway, I'm not getting your point here. Who's pm's would we get in the rss feed? Besides I don't want to subscribe to your pm's.

He means RSS feed of OWN inbox.

But aren't RSS's public to subscribe? Or is it just because it would be a hell of a lot of work to implement a private-per-user system?

It would not be hell of work. pm_rss.php?user=%username%&hash=md5('r36fHFY7')
Pretty like cookie-based auth works.