It's not as simple as "It's only 10 seeds so it's fine." Here is a post from 2008 by [MENTION=6193]Av8tor1[/MENTION], and I wouldn't doubt is something has changed but if it has it surely hasn't made it more simple.
Legal importation of seeds into the USA
There is a post here somewhere that highlights a shipment of material (plants I think) that was seized and he was heavily fined for it. People outside of the USA do not care if you follow the laws or not, they're not the ones that will be held responsible if it is done wrong. Contact the right agencies and do all your own research and verifications. It is you that is responsible for bringing them in and making sure you follow all appropriate laws.
Andrew