i saw this at another homeschool forum today: http://www.abcthekey.com/
it looks pretty good, so i thought i would share it here as well. my son already reads really well, but i'm still considering using this to go alongside his spelling program. We use AAS, which is also orton gillingham based. i looked through the website today & it definitely seems like a solid program. just wanted to share.
hope this helps someone