just found this, any good? it tempts me because it also has 2 optical cables which I will need http://www.amazon.co.uk/Ex-Pro%C2%AE-Optical-TOSlink-SPDIF-Splitter/dp/B004J32MJG/ref=sr_1_2?ie=UTF8&qid=1333955056&sr=8-2Robert_J said:A splitter takes the signal from one source and sends it to two or more targets. You need an optical switcher. It takes multiple inputs and send it to one output.
http://www.monoprice.com/products/product.asp?c_id=104&cp_id=10423&cs_id=1042301&p_id=966&seq=1&format=4#feedback If you read through the reviews, a few people did use this as a combiner but only when using one source at a time. For a few dollars more, you can get a true optical switch - http://www.monoprice.com/products/product.asp?c_id=104&cp_id=10423&cs_id=1042302&p_id=2946&seq=1&format=2 .