Soup.io – well-known alternative to Tumblr. Reblogging, post types, themes, collab blogs, dashboard, artsy, great community already there. Soup can auto-import everything you’ve posted on Tumblr.
TypePad – Includes reblogging. Dashboard and post types similar to Tumblr.
This is likely to be buggy and imperfect, and is definitely not totally optimized, but it is at least a start at fixing the atrocity that is the new reblog structure.
kototyph 