Uphill Both Ways is an recently released Halo Reach soundtrack on Bungie.net.
The soundtrack appears to be the background music for the Multiplayer Madness trailer.<object width="500" height="405"><param name="movie" value=""></param><param http://www.youtube.com/v/I2C8du5_P7A&hl=nl_NL&fs=1&border=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/I2C8du5_P7A&hl=nl_NL&fs=1&border=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="500" height="405"></embed></object>
It's available via this link Uphill Both Ways