Below are some examples of the subjects you could write about:
- AJAX
- Android
- BPEL
- Cloud Computing
- Content Management Systems (CMS)
- CRM
- Drupal /WordPress/Joomla!
- Dynamics
- E-Commerce Applications
- Enterprise
- E-Learning
- Flash
- Games
- IBM
- Java
- JBoss
- MySQL
- Mobile Development
- .NET
- Networking & Telephony
- Open Source
- Oracle
- PHP
- Python
- SAP
- Sharepoint