Didn’t see a thread - so here goes. From http://www.xbox360fanboy.com/2008/12/04/free-online-multiplayer-for-sfii-hd-uno-and-others-for-the-holi/
Microsoft has announced a special deal for the holidays. In addition to the XBLM Deal of the Week – the Legendary Map Pack is still on sale for Gold members, by the way – Microsoft is also running the Friendship is Free promotion. Until the end of December, a select group of Xbox Live Arcade games will not require a Gold membership for online play. In other words, Silver members will be able to try online play in these games for free. The Friendship is Free promotion is active right now for the following Xbox Live Arcade games:
A Kingdom for Keflings
Aegis Wing
Bomberman Live
Hardwood Hearts
Hardwood Spades
UNO
Small Arms
Super Street Fighter II Turbo HD Remix
Remember, Friendship is Free only lasts until the end of December, so get playing.
Derek Daniels