I finally made the switch from My Yahoo to Bloglines as my primary RSS reader. I have always set my browser's homepage to My Yahoo, but when I switched to Firefox from Safari, by default, the homepage was the page that loaded. My Yahoo loaded slightly on the slow side and I wanted a page that loaded quickly. I tested Bloglines and it seemed to load fast, it also shows entries I did not read by session.
I find it very useful, just wish I can add a keyword search for news feeds like Yahoo! allows for Yahoo! News. Who knows, it might be part of bloglines.