Tech&ME: I presume that u have some specific reason for going for tablet pc instead of a laptop. Because at any time a tablet pc is 25-35% costlier than the laptop (which is a costly affair by itself) version with same configs. Loose parts, unreliable features, and imperfect handwriting recognition will keep these pcs from overtaking the notebook. Even after that if u r going for it then u must have some thing special.
OK, coming to point. In india, there are lots of models available in tablet pc. The most significants among them are Acer Travelmate C100/300 series, HP compaq TC1000 series, Toshiba Portege and satellite serie, Viewsonic V1100 series. Apart from them, other companies like fujitsu, LG, sharp, motion computing etc. are also coming up in the market. For the specific hardware config check this link,
http://www.tabletpctalk.com/faqs/comparison/2004.php
Surely u will get names of some companies there which r not present in india. But if u r going to buy it from abroad then its relevant.