Haha, 'Can someone tell me a 1-click solution to automate all my tier web2.0 backlinks? You know, an all in one type solution where every popular platform (wordpress, blogger etc) is flawlessly automated and works right out the box? - Oh and while you're at it is there some sort of magic program that will find a niche, create a website write all the content and then call google and organise my number 1 position?'
Okay now to not be a dick and actually answer your question
So Web2.0s change there sign up - posting and verifying process quite often, these 'all in one' posting softwares don't keep up that well with the web2.0 sites that are most beneficial (think high PR ones) because they change so often. 500+ web2.0s? Well it depends what you mean by web2.0 as it's a loose term - you can get your hands on a software like wikibomber which can post to way more than 500 sites but you must bare in mind that these are wikis and while still technically web2.0 sites they are no where near as beneficial as blogs (which is what I assume you mean). These wikis have their place in marketing and I use them myself, but you gotta ask yourself what you actually want..
If you're just looking to automate wordpress, blogger, xanga, livejournal and all the other big ones then your best bet IMO is to get Zennoposter and put some hard work in by programming the exact type of automation you want.. Unfortunately there isn't an out of the box solution for posting to these websites. Once you've got your own scripts though you can automate all these types of sites and the added bonus is that it's exactly how you want it.