mailing-list for TeXmacs Users

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I recently tried TeXmacs, and found it realy an enjoying experience to write 
a document using TeXmacs. I've been using LyX, but I'm thinking of 
transfering to TeXmacs.
I have several quesitons:
(1) I know in LyX, typing "Ctrl+enter" is equivalent to "\noindent" in TeX, 
which is very convenient. Is there any similar shortcut in TeXmacs?
(2) Is there any way to directly input a segment of tex code in TeXmacs? 

Thank you!