I just picked one up for my galaxy nexus this morning. Haven't used it, and can't say anything about it's quality, but overstock and eforcity are both brands I know so I'm hoping for the best. At $7.99 shipped, it's about half the cost of what I could find on Amazon. Here's to keeping my fingers crossed it works well!
Micro-USB 5-pin to HDMI MHL Adapter | Overstock.com
Micro-USB 5-pin to HDMI MHL Adapter | Overstock.com