Canon has the new consumer-oriented HV10 that unfortunately like the HC3 has no 1/8th-inch or XLR mic inputs, which leaves you to resort to the built-in mic or a proprietary mic. I don't think QuickTime Broadcaster can handle live streaming of HDV, although it can do H.264 compression live, so I'm really not sure.
Sony also had the now discontinued HC1, which has 1/8th-inch mic input. You can find these on eBay and even B+H. It was and still is very highly regarded for its small size, price, and image quality trifecta. The HC3 is better rated at low-light, but the two have comparable results.
JVC has the GR-HD1 that has rather bad image quality compared to the previous three. I would not necessarily recommend it.