Lately I've been looking for a web-based RSS/Atom reader. This is because I've started working and want to catch up on my feeds from work as well as from home. The first such service I tried (yesterday) is Bloglines. Registration was straightforward. However, I then noticed several problems with it:

1. It only has top-level categories to categorise the feeds, not sub-categories (and sub-sub-categories, etc.) like Akregator (the feed reader for KDE which I'm using at home) has.
2. Possibly as a result of it, or due to a different bug, it failed to properly import the OPML file that akregator exported.
3. Bloglines displays many recent messages (200 or so) from the archive of messages of the feed that it keeps in one huge page, that takes a lot of time to load, and overloads the memory.
4. Some functions failed to work in Konqueror 3.5.x and I had to switch to Firefox.

In short, I didn't find it good enough for me to use. I think I'll try Google Reader next and then maybe try to install Gregarius and see if I like it. (even though I'd prefer a hosted solution).