Write a module that has Begiak (our IRC bot) keep track of users, and when a user it hasn't seen before enters a channel it's monitoring, have it greet them with a custom message, such as "Welcome to #apertium, (user)! Please stick around for a while and someone will address any questions you have."You'll have to keep track of users for each channel, and you should make the message enablable by channel. Also, allow a user-specific greeting to be enabled (e.g., for the ap-vbox user). For this task, you should fork the bot on github and send a pull request when you're done.
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