Now that you're acquiring web directories, I might know of a few (ahem) web directories that might be available.
In fact, I bet there's a lot of people out there that have web directories that were built about 2-3 years ago when it was "fashionable" and "trendy" to build a web directory about something "in their niche". Now it appears that everyone's jumping on the "social media" bandwagon and creating "social" sites.
Keep in mind that when you're adding sites to web directories, I would look for a few things:
- make sure that the page where your site is going to be listed doesn't have "issues" like being grey-barred (or PR0, etc.)
- make sure that the page where your site is going to be appear is indexed.
- it might not be a bad idea to look at the sites already listed on that page where your site is going to be listed and make sure that the directory is showing as a backlink (check Yahoo! using the linkdomain:domain.com search).
- make sure your site is going to be listed in an on-topic category
- make sure your site is going to appear on a page without a ton of other links (when I say "a ton" I mean typically 100+ links on the page.