I've been using Google Reader for the last couple of years to read Hacker News. Reader was a good option in the early days, but today the amount of daily submits makes this "mission" intractable, and the signal to noise ratio makes it less enjoyable.
With so many options to choose from (https://spreadsheets1.google.com/ccc?key=tCo5BIN61ciUkDjS2aLqjOA&authkey=CIeUndcL&hl=en&authkey=CIeUndcL#gid=0), what do you use? I may be tempted to create yet another application if someone can point to a good feature missing in the existing set of solutions.