I didn't do a good job of explaining this.
1. Forge is still going to be developed and nothing really is going to change. The DMCA notice just makes me change where I post Forge, so it can be downloaded. Torrents could solve this problem but I try to make it super-easy to try Forge, which is why I have a plain, old-fashioned download link.
2. I don't blame Wizards of the Coast. I started Forge as a pet project and released it (on a whim) on the internet. I never thought about violating copyrights or anything.