TrueCrypt - First phase of Audit finds no evidence of backdoor.

This is definitely good news as it is a popular tool used by everyone and let's hope the 2nd part of the audit has similar results.

Will this ever happen in a closed source world?

Will the  vendors selling security products allow us to audit their product. After all, 

1. We are paying them millions purely based on trust 
2. We also know that many of them were have been hacked before.

The link below has more information:-

http://arstechnica.com/security/2014/04/truecrypt-audit-finds-no-evidence-of-backdoors-or-malicious-code/