There is 0 sites in the system you have to find them by yourself or you can harvest them with inbuilt scraper.
Its really easy go to any status.net websites lets take identi.ca for an example and copy an text which is relevant to status.net websites.
Now most of them has text
", a micro-blogging service based on the Free Software StatusNet tool. Join now to share notices about yourself with friends, family, and colleagues! (Read more)"
Just paste it into scraper search query field and hit scrape. Now based on Yahoo search engine program will collect all urls in search results which is related to this text and you can save them as txt file.
From there you can already import them into program, clean them and so on.
Im not sure how much there is them without captcha cause im the lazy one and ill just use captcha entering service.
Program has inbuilt captcha service so you can just buy 2000 captchas from buypasscaptcha and insert their key into program or you can choose manual way and enter them by yourself.