2mbps thingy is possible as minimum by major big isp's. But the thing is they don't want to.. They feel 256/512k is more than enough for browsing/downloading. I feel small regional players(soon to be big) like beam,fivenet.. Etc Etc will play a keyrole in changing the broadband scene in India.
What the hell can u do in 512kbps speed. Cannot play online gaming with that, which i am facing now