eLearning, E-learning, E-Learning or e-Learning?

I agree with Jeff - no correct, or incorrect syntax here. as long as you stick with one.

Nevertheless, out of pure curiosity I searched for both terms and got the following (perhaps quite useless) info: 

• Google gives about 12,200,000 results for "elearning", and about 17,300,000 results for "e-learning". This would indicate that "e-learning" is more common than "eLearning" - unless the extra 5 million references were all coming from online discussions about the frequent misuse of "E-learning"
  

• In Wikipedia's entry on "E-learning", the syntax "E-learning" is used 97 times, whereas "elearning" only 10. 

• It seems that offline publications about electronic/online learning prefer "elearning", whereas online articles more frequently use "E-learning".