I just read a review of TheMoneyBlogs which is a financial blog aggregator run by Trading Markets.  The review was done by Business Week and was not favorable.  I'm mentioning it now because I found myself in the same situation that Business Week found other financial blog authors. 

I was approached by Trading Markets asking me to allow them to pull the full feed from my site, essentially pulling all content, and having it displayed on Trading Markets and The Money Blogs.  What was in it for me?  I thought that it would give The Forex Project more exposure but after some technical issues they were having pulling my feed, I decided to abandon any attempts to have my posts displayed on their site.  I'm glad I did at this point seeing that Business Week sites that the link back to your blog that Trading Markets places on their site was hard to find and tucked away.  In addition, they plaster ads everywhere essentially making revenue off your hard work.  So I'm not really knocking their business model; if they can make money doing that fine, but I'm just glad I'm not contributing to it.  

http://www.businessweek.com/technology/content/oct2006/tc20061025_067653.htm