BloggerCorps

Hi,
I've just started blogging ( http://www.onwardvia.org/ ) to organize people for change in the way we get around (moving from car-dependence to flex-tripping). My blog is hosted by my website host (Hostway), but I need to move because Hostway says they can't get my hyperlinks underlined for readers. I'm considering moving the website to DreamHost.com and looking for open source software to power the blog. Another alternative is to move the website to DreamHost and move the blog to a free blogging site. Can you advise me on pros and cons for these alternatives? I'll be grateful for any insights you may have. Thanks.
Carol Blair
Onward Via
www.onwardvia.org