Not 100% sure but I think you can scan you own copy in just not distribute it.
I think I remember an article some time ago about this. Providing you DO NOT let it leave you possession, or sell etc... Then it's ok, like making backups of DVDs you can't sell,give away etc, but you are allowed to "protect" your investment, by making suitable provisions
Obviously a searchable PDF would be awesome, and if wyrd were to release it I would buy it...