backlinks = hyperlinks in other web sites that point to your site sandbox = term used to refer to situation where new sites apparently have to wait a while before Google displays site in search results... the wait is related to site's subject matter... e.g., some local business may wait a few weeks... a porn, travel, or gambling site may wait a year? (or whatever)...
Why are so interested in such a big number of the links...Number doesn't mean quality...As for me I get qualitative links from the sites/blogs with good stats...