PCinsight has posted a D-Link 4-Point USB Hub review.

There are two methods of providing power to the hub and any additional USB peripheral. In bus-powered mode, each port is given 100mA. As with the bandwidth issue, this is generally fine for input devices such as keyboards, but is insufficient for digital cameras, or webcams. For this reason, the DSB-H4 does have a self-powered mode. In this mode, the hub connects to a standard wall outlet, and provides up to 500mA of power to each port. Aside from printers and scanners (which have their own power source), this is more than sufficient.

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