Aggregating blogs is not technically difficult. (See previous posts: How to create an aggregated feed and Feed aggregator choices.) Finding other people to aggregate with can be a challenge, however. Feel free to comment here in order to find other people to aggregate with. One way to start is to suggest a topic (neuroscience? medicine? new bloggers? meta-science blogging? students? faculty? physics? astronomy? anthropology?) that you blog about, and ask if others want to aggregate posts on that topic.
Remember, if you are an independent blogger who wants to be listed on scienceblogging.org, putting together an aggregated feed is currently the only way.
Also, remember that you can choose to aggregate only selected posts if you want, using tags as filters. Or you could aggregate your entire blog.