Be careful about blasting your web2.0's, in my opinion. Some sites, like squidoo or hubpages, might notice the incoming links as belonging to spam neighborhoods and delete your property, as they don't like their site used for advertising purposes. Not that it's a huge deal if it's a property you dont care about, but I've heard of some people who have set up a nice network and have their hubs/lenses taken out from underneath them. Sort of a hassle to have to go back in and re-link everything, too, because your link network chain is broken. My suggestion is to blast, but blast slowly and carefully to your properties you care most about.