Several 'new maths' have come and gone, the latest being to change how blogs are valued in the game, and this has led to a lot of renewed interest in shares play, and new strategies to increase profit for those players with blogs in the game. I'm working on understanding the math, and use it to my advantage.
Player Eaglehawk has created a blogroll (a list of blogs that can be included on a player's site to provide links to other blogs in the roll) in the hopes of adding value to players blogs. This sort of thing has great potential, I believe.