Consider this a public service announcement, for those of you who don't know better:  Please don't TYPE IN CAPS.  Those of us who live in the technology world equate typing in caps to screaming, and quite literally we hear a screaming voice in our heads every time we read an email written in all caps.  If you don't believe me, try this definition from Wikipedia:

On Internet chat systems and Usenet, typing in all capitals is considered rude, the large letters akin to shouting or yelling within the social context. On a more practical level, caps lock may be difficult to read. [1]A user who excessively uses capital letters may be advised to "lay off the caps lock."

If you're still not convinced, please read this email & IM etiquette posting.  Oh, and thank you for not shouting.  :)