Peter Martin is happy to share his Joomla expertise with other Joomla users. He regularly gives presentations at national and international Joomla conferences and Joomla User Group meetings. Below is a list of his presentations.
With Joomla 2.5 and 3.x it's relatively easy set up a multilingual website without using 3rd extensions... in 10 steps!
You can extent the functionality of a Joomla website with different types of extensions. And with a little PHP & MySQL knowledge, you can create them yourself.
All software contains small errors ("bugs"). Joomla is no exception. To solve these errors small improvements ("patches") are created and released.