Hello,
No problem, looks like I always log on just after you!
Have a look at the following thread for KML documentation (actually it's a sticky one at the top of the forum board):
http://bbs.keyhole.com/ubb/showthreaded.php/Cat/0/Number/366549As for a KML editor, the GE client itself is the best place to start! Have a play with different options in the client then save what you're doing as KML and have a look at the code behind it.
Of course, there are lots of things that you can't do with the client where the KML reference documentation and this forum will come in useful.
TextPad has been mentioned; it's a good all round editor. This recent thread talks about a few ideas:
http://bbs.keyhole.com/ubb/showthreaded.php/Cat/0/Number/516329Personally, I just use notepad.exe

(Remeber to format the text/set encoding as UTF-8 by the way.)
Have fun!
Simon.