Do you use any kind of aggregator to collect all of your online activity into one place, aka a lifestream (definition here: http://www.readwriteweb.com/archives/lifestreaming_primer.php)? Maybe it's Tumblr (http://www.tumblr.com/) or MyBlogLog (http://mybloglog.com/), SuprGlu (http://www.suprglu.com/) or Profilactic (http://www.profilactic.com/) (I know, awesome name, huh?). Or the recently-released and much talked about FriendFeed (http://friendfeed.com).

I'm doing research and need to know HOW you use these services. Do you go to the web page and follow your friends' lifestreams? Do you get an RSS feed? Do you post your own lifestream on your blog (or elsewhere) so others can follow your online activity?

Spill it. Give me your wish list. What do you like/dislike about these services and what would be really useful for YOU in a lifestream, either for your own use or to follow friends.