raincoaster has an alternative, though i would also suggest that in this way, you do all there is to be done in that one wordpress blog (ie checking stats, reading friend & tag surfer & my comments), before you log out and leaving comments with the other blog url you want to use . that way you won't have to keep logging in and out.
i'm not sure about this, but i think that you may not be able to keep track through my comments because you left the comment while logged out. i think you have to be logged in to be tracked. but that's just what i think, 'cos i'm not sure! lol