http://www.directory-owners.com/ – A web directory owners forum, taken several interviews.
http://www.nobledirectory.com/directory-owners/ – Ourselves, taken a couple interviews till now. Planning to do more soon.
http://www.dirten.com/ – Blog sharing interviews and some inspirational posts about directories.
http://www.directorykit.com/ – Taken a few interviews, and shares directory tips.
http://www.web1directory.com/blog/ – Has an inspirational interview of a directory owner
http://www.thedirectoryblog.com/ – shares information about directories, and owners interviews.
http://www.webdirectoryreviews.com/ – Reviews of the directory + Interview of the same directory owner. Done quite a few interviews.

There are a few others, would be shared soon.

Here are the Directory Owners interviews taken till now, might be more but i could find only these -

• Interview with David DuVal Owner of PHP link directory

• Interview with Paul, Owner of WSN Links Script WSN Link Directory

• Interview with Stuart C. McHenry, President, Site Sift Media, Inc.

• Interview with Kev – Owner of PhpLynx Script

• Interview with Simon Gooffin of esyndicat

• Interview with Chris Hoffman owner of Alive Directory

• Interview with John Scott owner of V7N Directory

• Interview with Peter Laws Owner of Pedsters-Planet Directory

• Interview with Jeff of Aviva Directory

• Interview with Bruce Stone owner of WoW Directory

• Interview is with Temi Odurinde owner of Haabaa.com

• Interview with Fabio Cuffaro owner of Massive Links Directory

• Interview with the Loren Baker of Umdum Directory

• Interview with Brent Champagne@Best Web Directories

• Interview with Marlin of Index-It Web Directory

• Interview with David Eaves of Biz-Dir Web Directory

• Amit Patel – Owner of GII Interviewed

• Interview with Jeffrey Behrendt – Aviva Directory

• Interview With A Directory Owner Who Has 50+ Directories – Malcolm

• Directories Battlefield – Let The Battle Begin – Loredan

• Interview with C. Bejenaru, lead programmer of Php Link Directory

• Interview with Mike Dammann about the Directory Contest

• Finally the eye speaks: Info Vilesilencer Interview

• Interview with one of the more experienced people in the directory field

• Phynder of DP fame, talks about his Un-Directory project!

• Interview with smub of idk.in

• Vegabond – AllTheLink.com Owner

• Sander Baumann – DirSpace.com Owner

• Damien Mase – DirectoryCritic.com Owner

• Simon Gooffin – eSyndicat CEO

• Mike Dammann – The man behind DirectoryContest.com and owner of FrogEngine.com

• Ben Johnson from PhpMyDirectory

• Gabriel Harper from PhpLinkBid

Here are the Directory Designers interviews taken till now, might be more but i could find only these -

• Shabu Anower: A PHPLD Template Designer – Interview

• Interview with Zeb (Agent47) – Designer

• Interview with Marko Petkovic – Designer

• Interview with Emillie Loh

Here are a few directory reviews + owners interviews taken by WebDirectoryReviews.com -

• Dmoz/ODP Web Directory

• BQTM Directory Presentation

• Bidding Directory Review for Zorg Links

• Directory Share Review

• UK One Way Links Directory Review

• Noble Directory Review

• Indie Coffeehouse Arts Directory

• Web Talk Directory Reviewed

• KingBloom Directory Review

• eSyndicat Directory Script – By Web Directory Reviews Network

Please share any other Interviews if they are not here, and i would add them. This would make an ultimate resource for newbies to learn something from the seniors.