cashroom,
You may like to check out this thread below.
http://www.theonlinewire.com/articleView.aspx?ID=122
CM has a good forum here and alot of knowledgable members too. If your ever unsure about a place check here first, then google it. If any thing is dodgy or not up to scratch I'm sure you'll find some info between the two.
Not that I use Sportsbooks but I'd be somewhat cautious of any place that did not allow or did not have access to some type of banking area to request a cashin. Having to email your request to me sounds a bit creepy.