These are the channel notice aliases I use. Very simple, but it also comes in handy sometimes. Only noteworthy thing about this is that it makes your own channel notices show up like anyone elses when you send one. Example:

[17:47:16] -arcane:@#opers- oh man Eeeegor is awesome
[17:47:28] -Eeeegor:@#opers- don't I know it!

alias o cnotice @ $$1-
alias oh cnotice % $$1-
alias ohv cnotice + $$1-

alias cnotice {
  echo $color(NOTICE) -tqm $chan $+(-,$me,:,$$1,$chan,-) $$2-
  .notice $$1 $+ $chan $$2-
}