[TxMt] best way to have a comment/uncomment selected text?

Hello, I am really starting to love textmate. I want to add functionality that will either comment or uncomment the selected text. Right now i have two commands; one that prepends '# ' to the line and one that strips the first '# ' on the line. I would really like to have this handily accessible under one command and have it automagically decide wether or not I want to comment or uncomment the line. I am sure that others have added this sort of functionality. Anyone have a graceful solution? While I am here does anyone have any handy python editing commands/macros?

--dfc Douglas F. Calvert http://anize.org/dfc/ .::. GPG Key: 0xC9541FB2 A mystic in the sense that I am still mystified by things...