Can anyone give their opinion on the various software / services that will take a formatted eBook (whether it is an ePub, Mobi, AZW, or even a PDF) and submit them for you to the various online bookstores (Amazon, B&N, and all the others). Are they worth the price compared to just doing it yourself? Do they collect and display good analytics (better than the sites themselves)? Do they handle updates to your eBook? Thanks in advance.