Getting to know the finer details about the share structure in general might be a good idea for you. let me look for some past posts of mine. there are 3 things to start with float, o/s and a/s. when you say lot of shares have been added since oct 07, what are basing that on? which one of the buckets (float, o/s) you think they were added to ? DFD does the TA thing FYI.
All posts are only my opinion and are not buy or sell recommendations.