Finally some awesome person updated ‘Improved Chat’ to work with 1.2.5. Once again you can bind all those tedious slash commands and stuff to keys (and in a better way than with other bind addons), you can toggle ON AND OFF chat (!), format incoming or outgoing messages, filter chat and so on and so on.
PS: For those who did not use it before: open archive and drag all files into your minecraft.jar, then delete the meta-inf folder in the minecraft.jar.
Type ‘~help’ into chat to get a list with all commands the addon offers.