You should migrate to wordpress till 31. May!
1. Process is easy
2. It will preserve (transfer) all your images in full size…
3. WordPress have more great themes than tumblr and others.
4. Twitter integration, FB and more..
5. Free or Premium (custom domain)
Just create your blog and follow this steps: Import from Posterous
The other alternative is posthaven.com they dont have free service but its just 5$ monthly
Not shure what to say about buy- take technology-resources-then destroy…
Apsolut 