Asus 1215B has multiple processor options:
E350 1.6GHz (dual core)
OR
C30 1.2GHz (single core)
OR
C50 1.0GHz (dual core)
Asus 1215B that techtree reviewed was with C50@Rs. 17,999 and I think it will take quite some time to hit the market in India. Techtree previously reviewed Asus 1215N, but its still not available here. The ones that appear on Asus India website are only available in the local market.
Go for netbooks with DOS, it saves a lot of $$$. I purchased an Asus 1215T last year with DOS, setting it up with Win7 ULT. using a pen drive was a breeze. The support/driver disk that came along with it worked great too!