American Express Membership Rewards - MR to Sirius Points ?

Anyone know if this is possible for US Amex cards ? There is no obvious link on the MR website.

From the Sirius website:
"As a member of American Express Membership Rewards*, you can now redeem your Membership Rewards Points into Sirius Points and boost your points balance to put towards any redemption at Jumeirah.
Visit your local Membership Rewards website to transfer your points into Sirius Points today.
*This is available in participating Membership Rewards programmes only."

Read this recent thread about transfers from USA Membership Rewards to Cathay Pacific Asia Miles by making an intermediate transfer to an American Express International Dollar Card account. The exact same (undocumented) process should work for transfers to Jumeriah...

http://flyertalk.com/forum/showthread.php?t=794083

Be aware that the transfer ratio is 20:1. In other words, 1,000 Membership Rewards points are worth 50 Sirius points.

total waste of points