If you've been following the blog, and adding support to your drivers for PrintTicket, then you're probably looking for some applications to test your PrintTicket implementations with.
The best place to start is the new photo print wizard (PPW) in Vista Beta 2 (Be sure to note the breaking changes in my previous post: http://blogs.msdn.com/benkuhn/archive/2006/06/07/620980.aspx!). The PPW has been completely rebuilt, and while the old one was effective, the new one is much cooler. Among other things, it has three drop-downs for some of the most commonly used features right on the first wizard page. Those three drop downs are driven off of PrintTicket and PrintCapabilities. It's likely to be one of the first places an end user is going to see the PrintTicket experience that your driver supports.
The other 'apps' that you'll want to run are the PrintTicket test tools provided in the WDK. PTTest.exe is the best place to start there.
If you're writing a filter-pipeline driver (http://www.microsoft.com/whdc/device/print/XPSDrv_FilterPipe.mspx) then the XPS document converter that handles GDI-XPS conversion will invoke your PrintTicket support.
Office 2007 is still DEVMODE based, so you won't be able to use it to test your PrintTicket support.
Also, watch for more WinFX apps to come online. WinFX printing will be all about PrintTicket support, as opposed to DEVMODE.