Samsung's Helix and Nexus XM sat rads at the Samsung Experience in the Time Warner Center in our fair city of New York. We've been kind of expecting the release of the Helix (which was announced at CES) any day now, but the Nexus is way overdue, having been announced last September. For those thinking of swooping in to make a purchase, the Helix is Samsung's portable with live streaming XM and an FM transmitter. The Nexus doesn't have the same live sat capability, but does have 512MB and 1GB versions for playing back pre-recorded XM streams; both feature MP3 and WMA playback, and can use the XM / Napster service. You can already pre-order the Nexus for $219 / 270, but don't forget that you can pre-order that Pioneer Inno for $399, too.