The problem is that Posterous is hard to crawl. For one; They'll continously and automatedly ban your IPs, even if you rotate over a lot of them. Two: Posterous can't take all of the requests.
We've (ArchiveTeam) unfortunally made Posterous unresponsive multiple times. So please be careful to not completely bring it down if you're doing a solo effort.
Please also bear in mind that it's not just to "chuck it into the downloader"..
Also, please use a sensible format if you're crawling/archiving this.
We're using WARC (Web Archive) which is an official ISO File Format standard - which the Internet Archive's Wayback Machine can use. It's also a pretty good and nice format for archiving web pages in general.
please ask on irc://efnet/#preposterus that's where the archive team guys hang out. I don't have a list of seeds but they may be able to figure out a way in which you can put 80legs to good use.
We've (ArchiveTeam) unfortunally made Posterous unresponsive multiple times. So please be careful to not completely bring it down if you're doing a solo effort.
Please also bear in mind that it's not just to "chuck it into the downloader"..