I noticed you cannot select "silent" as a ringtone like you can on other phones. I hate that because the ringer could ring if I accidentally adjust the volume.
I had the same issue with my DroidX and I found an app on the Market called "Elixir" which lets you create widgets of several different sizes ranging from 1 icon to a max of 27 icons in 3 rows. There are several configuration options within the widgets. I have included a pic of my "games" & "utilities" on my home screen, each of which have 7 icons in 1 row. In the utility widget my ringer switch is 2nd from the right and provides the option of normal, vibrate & silent which rotate with each touch . Hope it helps......Mike