The best way to use dashkards is the dashkards widget.
All dashkards™ are licensed cc:by-nc.You can use them in any non-commercial way you want,but please credit and/or link to dashkards.com.
Gmail icon by tRiBaLmArKiNgS
Google Docs icon by Jay Holtslander
Google Reader icon by Filip Hracek
Mac OS X icon by Frnak
Flag icons by Icon Drawer