At last Tata Indicom could come out of the jinx of not having any internet pack for such a long time, after years. Earlier there was an offer of Rs. 75/ month for unlimited wap on handset (specially bundled with SAMSUNG Explore model launched in September 2007). Later the plan was withdrawn and the subscribers were left with no options but to go for steep internet charge of 1p/1kb. 
Now, different prepaid and post-paid plans have been introduced as shown below.  These rates are quite competitive compared to the prevailing rates of other operators like AirTel, Vodafone, Aircel, Uninor, !dea, Reliance, BSNL or even Tata DoCoMo vis-à-vis their speed.  
I have activated a post-paid monthly pack and enjoying it. The speed and stability of connection are quite decent. 
 PREPAID INTERNET PACK	MRP	/USAGE CAP 
Daily Pack	               Rs.5	/ 50 MB 
3 Day Pack	               Rs.12	/200 MB 
15 Day Pack	               Rs.33	/500 MB 
Monthly Pack	               Rs.43	/1 GB 
Jumbo Monthly Pack	       Rs.94	/2.5 GB 
POSTPAID INTERNET PACK	MRP	USAGE CAP 
Monthly Pack	        Rs.43	/1 GB 
Jumbo Monthly Pack	Rs.94	/2.5 GB 
Usage beyond the capping or validity period will be charged at a rate of 10paisa/10KB. Check here