Actually, my question is a bit different.
Is it reasonable to develop BitCoin libraries for Erlang, is there a need for it, or am I just alone?
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
The answer depends on your goals.
If you want to learn bitcoin technology or/and erlang language - these are the reasons to start.
If you want to earn money or/and create great software - i doubt that erlang is good for this.