ICs is short for Ice Cubes, which is the currency of the forum.  Currency is gained by posting and participating in topics.  Also, you can gain ICs if someone donates you some.  This currency is used in the cybervillage to buy stuff.  New items are always being added.

Please note that the entire cybervillage is fictional and this is not real money!

Also, only registered members have access to the cybervillage.  So if you have not joined, do join in order to experience the fun!