Quote:

on me*:JOIN:#channel: {
/say "your text here"
}

That would be;

On me[color:blue]:
*:Join:#channel,#channel,#ect:{
msg $chan your text here
}
[/color]
Since, 'me' is not a userlevel, but a prefix to the event and you should not use /say since it doesnt support '#channel'.

In addition if you want a random quote on join.

On me[color:blue]:
*:Join:#channel,#channel,#ect:{
msg $chan $read(filename.txt)
}
[/color]
Where, your filename contains 1 quote per line.

Eamonn.