Get the ID of any SharePoint Wiki page

Hello _spPageContextInfo!!!
I found this little gem by viewing the source of my site spdwiki.com.  Simply running a console.dir() on this object reveals these properties:

1. alertsEnabled: true
2. allowSilverlightPrompt: "True"
3. currentLanguage: 1033
4. pageItemId: 1
5. pageListId: "{15d98081-a722-48ad-a30c-c25d4c31a228}"
6. siteServerRelativeUrl: "/"
7. userId: 1
8. webLanguage: 1033
9. webServerRelativeUrl: "/"
10. webUIVersion: 4

I've noticed running this same inquiry on a different site, say http://www.sharepointfabian.com, the properties are different:

1. alertsEnabled: true
2. allowSilverlightPrompt: "True"
3. currentLanguage: 1033
4. pageListId: "{a4668dd2-4dac-4cce-baf0-ddb1ea4f2d5e}"
5. siteServerRelativeUrl: "/"
6. webLanguage: 1033
7. webServerRelativeUrl: "/blog"
8. webUIVersion: 4

It's safe to say, this is because the latter is a blog and not a wiki.

What to make of all of this?  I'm able to display pertinent data accordingly and no longer required to rely on the text of the page name.

var pageID = _spPageContextInfo.pageItemId;

It's a much cleaner solution that just feels good.

I've been working on a commenting system for a SharePoint 2010 system.  Knowing some of these internal variables that are floating around is invaluable.  Hope you find this useful as well.

Yes Josh, I'm going to finish this finally. ;-)