Regular java beans are just java classes that you write that must have certain things by convention. For example, they must have a set and get method for each public variable they expose. They also must have an empty constructor.
EJB (Enterprise java beans) are more complex and are used in Application servers such as JBoss. They have many features like remote usage, transactions management and much more.
For better explanation see here from just 2 days ago.
Can you really tell me that we aren't dealing with suspicious baked goods? And then there is this tiny ad:
a bit of art, as a gift, that will fit in a stocking