From reading the various fishless cycle log threads here for the past few months, it seems to me that it's pretty standard for a cycle to take a couple months or more. Of course that's usually without mature media, and I understand your frustration with that and the length of the cycle in general.
At least you're seeing activity. It's a lot more boring when you get the same stat for over a month, as it is in my case. I've not had any indication that anything is improving for about 5 weeks now, and I started over 60 days ago. It seems like your nitrite is getting processed and if the level manages to stay low then you may only be a few weeks away. I'm frustrated too, and I think it's very much a common thing for those of us who go through this seemingly endless process. Perhaps we should just put it in perspective. Some cases, including a recent one, have gone past 4 months. Also a good thing to think about is not all the time your waiting through to get the fish in there, but how much time the fish will be in there once it's ready. This will be a small blip off the horizon one day, and will be well worth it when you're done.