Continuing on

Last night I made an attempt to update what was going on while on wifi on my phone. Tried for a long time to get the post to go through but it never would. I'm not sure if I'll be able to make that work in the future or not. I like the idea of being able to work off my phone if I have the time.
I believe I talked in my last "not so posted" post, that I'm doing a lot of work in some grad classes right now. One of them is pushing me to set up a blog that I can use in my classroom. Although this has been some of my first experience with a blog, I'm being asked to use some other sites. Sites that are more dedicated to blogging, not the whole social network that ning provides.
I'm debating between using edublog.org and blogspot.com (blogger) I've played around a little bit with both of them but being a very novice blogger I don't really know what I should look for. If any one has any suggestion of which is a better choice and why, I'd love to hear what you have to say. If you have any advice on what I should look for, I'd appreciate that as well.
Thank you
Tim