When a domain drops, is subsequently purchased and the previous site is replaced with a "temp parking page", how long will the past site stay indexed within the search engines? For example, I came across this domain for sale here at DP.....I'm assuming it dropped and was then purchased. Anyway, the site is indexed in Google, DMOZ, has a PR2, etc. When I Google the domain I see the index page is listed. The site currently has a temp Godaddy page. Generally speaking, how long will a typical site such as this keep its search placement? Lose its Page Rank? Be booted off DMOZ? I appreciate any replies!
The past site will stay indexed until the search engines crawl it again. The best thing to do if you bought this domain is to do a 301 redirect from all pages to your home page and you'll retain a good chunk of the backlinks to the site and thus, the PR. I know a lot of people advocate trying to make your content similar to that of the old site, but personally I'd rather do my own thing and build my own community rather than worry about a few backlinks. By the time the next PR update hits you should have enough links to your new incarnation of the site to retain or improve on the PR. You might have to relist on DMOZ but honestly does anyway care about the directory anymore?
If the link is dead, it should get moved to a list that puts it in "limbo." If the link is not dead (i.e., you direct it to a temp page or redo the site), then it really depends on how active the editor in charge of the particular area is. Unlike the search engine bots, DMOZ is a human-edited directory.