Security
The PCI Council is delusional: claims the standard is solid when breach after breach confirms it is not. Blames the victims for poor architecture.http://www.bankinfosecurity.com/interviews/pci-council-responds-to-critics-i-2175
Good overview of the security landscape. Good tools with easy configuration will be key.
https://securosis.com/blog/securitys-future-six-trends-changing-the-face-of-security
Cryptography
Privacy
Training
A hackable iOS App used to teach the OWASP Top Ten Mobile App Vulnerabilities. Great tool to catch up with mobile security and secure application design.