This is a real shame. I have used astrid since the original Motorola Droid was the cool new phone. I purchased the add-ons. It was a great piece of software, and a useful web service that worked like I wanted. And it had no recurring service fees.
Now I have to find a new program. At least they allow me to export my data.
But I definitely dislike when acquired companies dump their product.
The sad thing is, if Yahoo had a replacement with one click move ready, I would be happy to move. But I am certainly not going to transition back to yahoo if I find a service that I like.