Theme

Its a standard Drupal Garland theme, but I like it because it is easy customizable and looks quite to me.

ok fine
actually i am new to using drupal but no problems so far

This is little different concept comparing to other CMS systems like Joomla or Wordpress. Drupal is more flexible and customizable. If you are familiar with CMS you should give a try to Drupal. I have tried - and I love it. Of course it took some time to break through it's specific.

ya agreed most i used is vbulletin ( and i like but it is costly also )
phpbb2

but now drupal also am using here and looks good
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Raj

i for once really like this really cool blue color combination.. its very soothing to the eyes and its so light that even my suckage of net can handle it with ease.. thumbs up...

The template of this forum is very delightful and very much encouraging to write some post here.
I like the color combination of this forum.The header logo is also simple and beautiful.
Still modifications can be done here to attract more visitors.

Can you share what is still needed for this site. What modifications?

i suggest you to use vBulletin for the forum...
If u dont want to spend money then there are several other alternatives like phpbb3,swf,mybb etc.,

What i feel is that it is bad to use drupal for forums...

Using drupal forums isn't bad idea. people are doing and I can say - really successfully. Of course you don't get such functionality as phpBB or vBulletin, but it is more than enough to make discussions. More functionality can be achieved with various modules like private messaging, attaching, moderation, permissions, and so on.
I like the idea of using single user account for site and forum. Easy to maintain - and it has good SEO.
Of course it could get better probably it will in future releases.