Rogers Cadenhead sounds skeptical about supporting RSS Cloud in most servers (never mind having the client side support for it):

RSSCloud also requires that all desktop software receiving cloud notifications functions as a web server. So if an RSS reader like BottomFeeder or FeedDemon adds cloud support, it must show its users how to turn off firewall ports to accept these incoming requests and possibly turn them off in their router as well. UserLand's attempt to put web servers on user desktops failed because it was too cumbersome to support. Back when I was writing the book Radio UserLand Kick Start and working closely with UserLand developers, their biggest customer service issue was helping users open up their firewalls so that Radio UserLand could act as a web server.

I was looking at the spec this morning, and recalled (like Rogers) that this has been part of RSS for a long time. I ignored it back when I created BottomFeeder, and haven't given it any thought since then until now. I was considering doing something as a demo, just to see how hard it would be - but I'm not sure I need my IT department asking me so much traffic is flowing out of our server :)

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