There is an alternative interface to the new site at Greater Wrong. It has a few problems (namely, it's hard to access archived content; all you get is a day to day listing of posts) but compared to Lesser Wrong it's at least usable. LW2 should support it officially in addition to the Lesser Wrong website, and perhaps even add features like logging in and posting content through it.
Hi, I'm the one who created Greater Wrong. I'm intending to announce it more widely once it doesn't have so many conspicuously missing features, but it's something I'm working on in my spare time so progress is somewhat gradual. You can, however, already log in and post comments. You can use your existing LW 2.0 username/password or create a new one. Let me know if you have any problems.
Might as well go with a bang.