The following commands can be entered in guild chat:
/gold x - donate x gold, e.g. /gold 1000
/mushrooms x - donate x mushrooms, e.g. /mushrooms 10
/sysblink off-makes the "Guild" button flash if new system messages are posted, e.g. user x has donated y gold.
/sysblink on -disables flashing.
/act -toggles the information displayed by hovering your cursor over a guild member's name between gold/mushroom donated and last activity time stamp
/w <name> <text>-allows you to send a private message to the person named. Use a "#" instead of a space for names with more than one word
/gold ;-) # -Bets the amount of gold you replace the # with, for the gambler in the tavern
/mushroom ;-) # -Bets the amount of mushrooms you replace the # with, for the gambler in the tavern