This is somewhat answered by the second question in the forum FAQ for which the answer is basically "Hey, go read SBR":
From the SBR entry:
http://sbr.sportsbookreview.com/Revi...k/default.aspx
Most common Complaint: Above average cost for transfers
Cost of Withdrawals:
For US Customers:
* Check
- $60 fee
- $4,900 max withdrawal
* MoneyGram
- $1,500 max
- Fees vary per amount