DA has this new widget for your page called the "activity feed". You can see it by going to my page here at it's on the top right.
I'm not sure what I think about it. It kind of reminds me of Tumblr. I see a lot of people on here eliminating many or most of the default widget and having almost only custom widgets, and maybe this would be better for someone who wanted all of the left side open to custom widgets. I'm not sure it works well with the other widgets, and instead is designed to replace the others. It's strange you can't put it on the left.
Part of the problem is that certain widgets can only do in certain places. You have a upper left one, an upper right one, and a bottom one. Custom widgets can only go in the bottom one. Comments, polls, journal entries and maybe some other things can only go in the upper right one. Gallery and favorite widgets can only go in the upper left one. So it's difficult to alter the site to be exactly what you want.