I've created something exactly suited to this purpose but neither have the time nor budget to advertise it so it's still 'hard to find' by anyone looking for it.
www.opencryptocurrencyreview.com
Please let me know what you think. It's not strictly a journal, but more of a place which collects research and then this research can be discussed without being lost in the dungeons of bitcointalk or reddit. It works on a voting system like reddit so the hope is that the good responses rise to the top.
Please can you help me advertise it. It's not for profit. It's purely to help the community discuss research ideas.
For example: here's a link to the Bitcoin whitepaper: http://www.opencryptocurrencyreview.com/papers/62/bitcoin-a-peer-to-peer-electronic-cash-system
Very cool. I hope people see this and begin to use it.