It has been interesting watching the growth of Empire Avenue over the last few months. I started in the first beta when it first opened up and now as people are able to invite others to join, its growing at a nice pace. Everyday I find new and interesting ‘content’ whether that be people’s blogs or twitter chains. Also I enjoy their achievement system. For example, a week or so they had their 1000th user join and had a contest to ‘discover’ the newcomer and everyone who did so was rewarded with an achievement. More recently they had a contest in which the CEO of the company had to wear…