I've been curious about this for a while. Is there any reason to tier blog comments/forum profiles? For example, if I were doing a GSA blast to my web 2.0s is there a benefit to blasting them with 5000 links then 100,000 links to the first GSA blast? Or does it make more sense to just blast all 100,000 to the web 2.0s? Any advice or input would be appreciated.