HDMI out in Samsung Galaxy S II via MHL (microUSB port)

Android-powered Samsung Galaxy S II is the first smartphone to boast an MHL port (MHL = Mobile High-Definition Link) that can be used for dual-purpose USB or HDMI out (video). MHL lets you output HD video using HDMI. You’ll need a special cable of course, a special 5-wire micro-USB to HDMI cable lets you send video and audio to existing HDMI-equipped displays. Unfortunately, today’s TV won't charge via MHL during playback unless you insert a phone charger adapter between the Samsung Galaxy S II phone and TV or wait for MHL-enabled TVs to begin shipping later this year. The MHL standard was first announced in 2008 as the Mobile High-Definition video Link "standard" for mobile devices promoted by a consortium that includes Nokia, Samsung, Sony, Toshiba, and Silicon Image.

For those of you who are new to the Galaxy S successor, the Samsung Galaxy S II comes with a 4.3-inch Super AMOLED Plus display, a dual core processor, 8MP camera, and more. (source 1 2 3)