Not exactly sure what you mean?
The site is currently in a beta stage and uses STEEM only at the moment..
As for adding STEEM tokens to Steem-roller.com and allowing them to be bet, it is planned for future versions.. But is likely a long ways / version 2.0.0 type function for the site.. So would be in the later part of next year or something.
Or do you mean can you purchase the cord with STEEM? In that case not directly, but would have to convert STEEM to Bitcoin then to Paypal funds in order to purchase the cord from newegg.ca.