The maximum users ever online is mentioned as 452. Is it true? Or a bug?
No bug,
Its about time the google search spiders paid a visit, and looks like it did 
Even so, we just have 2 pages of results when I search for techenclave.
Otherwise it wouldn’t show up at all.
we have been submitting our site to multiple search engines and meta crawlers.
It usually takes 3-4 weeks(minimum) for a free registeration to get indexed into the search engines.
As, we submitted the site to multiple engines at approximately the same time, it is possible that the different spiders came about roughly the same time.
tried dmoz.org?
Yes,
site submitted to Dmoz.org also.