Google may not favor directory listings the same as in years past.
beussery.com/blog/index.php/20 ...

[Moved from "Google no longer promotes Yahoo directory" – Tony]

Google have stopped encouraging webmasters to submit their sites to paid directories such as Yahoo – for years Google told webmasters to do this practice in their Webmaster Guidelines but now this information has been removed.

google.com/support/webmasters/ ...

However, this change hasn't yet been reflected in non-US versions of the guidelines...

google.com/support/webmasters/ ...

(From beussery.com/blog/index.php/20 ...)

I bet it still helps to have your page listed in DMOZ.