These are iSwitcher themes and available in (you need my Source) Installer app and on the iSwitcher site in pxl format.

For those that are using Installer I have created a web page that shows screenshots of the included themes. Just click the more info.. button in the lower right corner while viewing either theme. Hmmm better add about 950 more words....

Note - you won't have the "Reinstall" button, until you install the themepak

There is also theme previews on the iSwitcher main page