Week 5 Reflection: Blogs and Wikis...and Moodle?

I have been thinking a lot this week about how I want to set up the online component of my biology courses this fall.  Should I use a blog, a wiki, Moodle, or a combination of all three?  The Science 2.0 articles on blogs and wikis make good cases for both.  All of these platforms allow students to be active participants both inside and outside the classroom.  But after reading Eric's reply to a question I asked him... (http://teachingsscience20.pbworks.com/w/page/42245268/onlinediscussion), I decided to keep Moodle as my class page (teachers at our school are supposed to do so anyway) and maybe link a blog and/or wikis to that.  I just haven't figured out yet how best to utilize those in my courses, or if I even need to since we use Moodle.  One of the things I thought I could do with a blog was to have a different student responsible each day for posting a summary of what we did in class.  Those posts, along with comments from classmates, would give us a complete record of the entire year.  As for wikis, maybe they could be used for projects since students can be collaborating on them at any time from any location.