I needed a fast card R/W for workflow on jobs with all these high bit rates. I was looking for a firewire card reader/writer but could not find one. I've been using a 7D with A FW card R/W works great. I came a cross the Sonnet card at B&H but it was $99.00. Very expensive I thought but a must for my workflow.
I went to Sonnet's website. found it for &49.95 . Shipping was extra I think &9.95. So $60.00 US dollars. Make sure to download the drivers for your PC or Mac. The drivers were not installed for me. I'm on a Mac. There is one for $29.95 but it doesn't except the the faster cards from my understanding.
Just wanted to give a heads up. Hope this helps >wed page below
https://secure1.sonnettech.com/product_info.php?products_id=390&osCsid=8d19121e660aa59388a9d4f47200cb9c