If you go into a profile, be it a person's or a community's, there is a tumb tack button on the profile toolbar. This brings up a page that says:
1. post a new entry to "list of tags to chose from"
2 .posts a new entry
3. uploads a new userpic
You can check mark these things so you get sent updates when friends post to their journal in you email. I love this because the Friends page doesn't work well for me. I ignore it. I love this... It is especially useful for a community when you want to know when people post to it. I love it!
Okay done with my praise.