Response to Usability of Feeds
I think Tom's pointer to the BBC is a fairly good transition to where we are heading. It will take the desktop OS or browser to make it easier. Neither of these are very innovative or quickly adaptive on the Windows side of the world.
Firefox was the first browser (at least that I know of) to handle RSS outside the browser window, but it was still done handled in a side-window of the browser. Safari has taken this to the next step, which is to use a mime-type to connect the RSS feed to the desktop device of preference. But, we are still not where we should be, which is to click on the RSS button on a web page and dump that link into ones preferred reader, which may be an application on the desktop or a web/internet based solution such as Bloglines.
All of this depends on who we test as users. Many times as developers we test in the communities that surround us, which is a skewed sample of the population. If one is in the Bay Area it may be best to go out to Stockton, Modesto, Fresno, or up to the foothills to get a sample of the population that is representative of those less technically adept, who will have very different usage patterns from those we normally test.
When we test with these lesser adept populations it is the one-click solutions that make the most sense. Reading a pop-up takes them beyond their comfort zone or capability. Many have really borked things on their devices/machines by trying to follow directions (be they well or poorly written). Most only trust easy solutions. Many do not update their OS as it is beyond their trust or understanding.
When trends start happening out in the suburbs, exurbs, and beyond the centers of technical adeptness (often major cities) that is when they have tipped. Most often they tip because the solutions are easy and integrated to their technical environment. Take the Apple iPod, it tipped because it is so easy to set up and use. Granted the lack of reading is, at least, an American problem (Japanese are known to sit down with their manuals and read them cover to cover before using their device).
We will get to the point of ease of use for RSS and other feeds in America, but it will take more than just a text pop-up to get us there.