Extreme Overclocking has posted a review on the Thermaltake HardCano 2 HDD cooler
Thermaltake strikes again with their new line of HardCano hard drive coolers! The really neat thing about these isn't their ability to cool a hard drive, but the integrated thermal probes. The HardCano 2 includes two separate temperature probes and LED readouts. Other models include replacing one of the LEDs with a 3 way power switch (to adjust your CPU fan speed for instance).Read more
The HardCano 2 is priced at $29.99 which is about $20 cheaper than a Digital Doc 5, however it only has two temp probes where the DD5 has 8 probes (and can control 8 fans).