A few more Pantheon 1.2 questions

I know you guys are still in development, but I'm happy to report that I'm zeroing in on a successful Pantheon 1.2 implementation. There are a few changes/adjustments needed for people who aren't using the strict Pantheon path layout. For instance, I'm configuring for several different domains which will eventually have live and dev versions. So I've set up new virtual host definitions.

I've successfully determined a workflow to import my existing sites manually into the Pressflow code, but have a few remaining questions holding me back:

1) The Solr path variable. This is set in the "sites-available" virtual host files, but what does it point to? For instance, the dev host file has "pantheon_dev" as the Solr path variable. If I want to enable Solr on a new site outside of the Pantheon layout, what should I change this variable to? I did a directory search and found "pantheon_dev" in three locations:

/var/lib/mysql/pantheon_dev
/var/lib/tomcat6/webapps/pantheon_dev
/var/cache/tomcat6/Catalina/localhost/pantheon_dev

If I wanted to setup a Solr site for "mysite.com" what must be configured where?

2) The memcache prefix. This is another value set as "pantheon_dev." If I want to enable a memcache prefix for "mysite.com" what needs to be done?

In advance, I apologize for getting you guys off track because I know you are focused on the getPantheon project, but if I can figure out these last two things, I should have a successful multiple site server running.

In fact, once done, if you guys would like, I'll try and write up a few customization instructions for people who want to beta test the Pantheon code. Documentation is my specialty.

Thanks again for the hard work. I'm using this as a huge training exercise, but I'm starting to appreciate the simplicity of the automated hosting environment you guys will be offering at getpantheon!