on the blogger dashboard there is an Add button on the left side under the reading list link that you can click on to add blogs by pasting in the url.
Yes, it sucks that they changed this. On your site, you have a "Join this site" button but I guess unless folks add that gadget, we're out luck. It's a pain, having to keep the dashboard open on one tab and check out blogs with another and copy and paste. Why ruin a good thing Blogger?!
Thanks. I wondered if I was just missing something...apparently I was missing the button that used to be there:/