Many i2p users observe this problem.
http://lm.i2p/nojs/signup loads very slowly. (5~10 min)
After clicking REGISTER, the site hangs forever (I waited for more than 1 hour).
Your .onion site - http://nehdddktmhvqklsnkjqcbpmb63htee2iznpcbs5tgzctipxykpj6yrid.onion/ - works fast.