I told someone I'd post an explanation of how to include links in blog postings, so here goes:
1. While you're creating a new post, highlight the text you wish to link. You can use any word or a web address: http://en.wikipedia.org/wiki/User:Futureclass
2. With text selected, click on the "link" button- 5th from the left, picture of what I believe is an earth with a paper clip (or something)
3. This will bring up a dialog box that says: "Enter a URL" with a space for you to type. Type in the address you want to link to.
4. Click "OK"
5. The text you selected should now appear purple and underlined in the edit box. When you publish or click preview, it should show up as a link.
Hope this helps!