I just want to point out that the majority of people who play blockland aren't noobs. There only seem to be so many because they stick out like soar thumbs when they do come along. Advertising and spreading word about blockland is an amazing idea. More modders, developers, and players will help the world of blockland grow and evolve; which is required if blockland is to survive. Right now we have a great community with active modders developers and veteran players to help people go in the right direction and its worked out so far for the size of the community.
I do however feel that if blockland is to maintain the correct environment as it's population grows in size, the forum and community needs to change accordingly. Blockland does have a learning curve, especially if you want to get into the homebrew parts of the community and when it isn't blatantly obvious, it encourages 'nooby' behavior and gives fuel to those that are completely nooby. Granted the exact specifics of this transformation will have to be thought out in more time that it takes to write this post, just adding a general "beginner" section with the very basics covering each subsection of the forum would be of great value.
Also providing moderators for each section or allowing some of the more adept/responsible members of blockland become admins of the sort for the community would help keep noobs in check.
One other thing that I feel to be important is the kind of advertizing that would need to be done. Renting out space on websites and getting banner ad's costs money when there are free solutions. And while posting on forums will attract more noobs than we really want, presenting blockland to other communities such as that of the independent game festival or even PC gamer magazine would attract a huge number of people for free.
Blockland is a cool game and people see that, show it to the right groups and i'de be willing to bet that they would dedicate their resources to helping us grow.
Hopefully badspot will see this, I'd like to hear his direct response to it and to increasing the popularity of blockland in any way.
Hopefully the community will see and reply to this thread, i'm curious to see their opinions on the matter.