syriarelief.org is a scam:
1. The site was created yesterday.
2. The actual Syria Relief site, syriarelief.org.uk makes no mention of syriarelief.org, nor does it mention accepting bitcoins.
3. There was no announcement anywhere by Syria Relief, except by first time posters on reddit and bitcointalk.
4. The "COMPLETE YOUR DONATION USING A CREDIT / DEBIT CARD" button does nothing.
Thanks for letting us know. Previously I was sceptical about this service, but now I am sure.
I would never donate my bitcoin to any organisation without full proof of them being honest and reliable.