In that case, going with different domains for different niches seems to be a safe bet. Thanks for the prompt replies!
Time for registering domains....duh!
PS - Here are some attributes about domain
[SEO Topic] What are your thoughts on this
(Add 11 listings from Yahoo Directory to it, from different categories like travel, entertainment)
Need some time to handle deferred joining date by three big IT companies.
If your work is still pending, I'll soon get in touch.