Finding Rosetta / PPC applications on disk I know how to determine if a program is an Intel or PPC application (with Cmd-I or in the Activity Monitor).

But how can I find all PPC applications that still lurk on my disk?

Before upgrading to Lion I'd rather know which (seldom used) applications on my disk won't work anymore (I'd be happy with GUI or terminal ways to do this).
Bring up System Profiler (System Information in OS X Lion) -OR- go to Apple, About This Mac and click on the More Info... button.  If in Lion, click on the File, Show System Report menu.  In the left sidebar choose Applications under the Software section and sort by the Kind column. Now just find the applications that are PowerPC.