WordPress MU

I've spent a long time searching, but with no luck, so far. How can I put a link on a sub-blog that links to the main blog? Right now, I'm hard-coding it, but would rather not.

I've tried all kinds of things like
`">Home'

but nothing seems to work.

<?php $current_site = get_current_site(); ?>
<a href="http://<?php echo $current_site->domain . $current_site->path ?>">Home</a>

How bout that?

That's excellent, thank you! I notice this includes a trailing slash, so I can append the directory name of another sub-blog to move between sub blogs. Very cool.

Since I'm trying to learn my way around WP, can you tell me where I can find a reference to other functions like get_current_site()? When I looked at the page of template tags at http://codex.wordpress.org/Template_Tags, it wasn't listed.

http://codex.wordpress.org/WPMU_Functions

Great! Thanks again!