NOTICE: No longer available. Many thanks to all who tried Fraser the Bot!

   Chatting with Fraser

To chat with Fraser, you can use the search functions to find fraserthebot, or use this link:

   Group chats

From this Skype FAQ:

Bots in a group chat only receive messages directly addressed to them.
Type @, and then select the bot from the list of group participants. Or type @ immediately followed by the bot name [i.e. @fraserthebot]. Type your message, and then wait for the bot to respond.

Also, based on the Skype developer's documentation:

In a group the bot will only receive messages directly addressed to it e.g. “@fraserthebot This is the message”. It will not receive other messages sent by group participants or notifications of users joining or leaving the group.