OK, some more details.
As per the commercial officer, I am the first customer to use this card in Kerala state ! This may not be true and I never meant to boast here. But it is not launched in most parts.
In my case I was very lucky as the DGM here (aleppy, Kerala) is a very nice person, a younge gentleman who is ready to experiment on things and very helpful. I could test the card before buying, could meet him in his office and could test it together. And the commercial officer here is also very professional, eventhough it was new to all in the commercial office, they really helped me.
I got 2 cards, I took it in rental basis. One of the cards didn't work, so I went to commercial office again on saturday to change it, I got it replaced in no time.
Regarding speed again.
If you have a BSNL CDMA (not the mobile one) tower near your area, you may get upto 100 kbps. But if your place is far away, it may go down to 80 or 60.
Comparing other providers, BSNL rate is really good. For example, Reliance charge 1500+ tax for the same thing. And tata has no unlimited option ! They charge 1500+ tax with a data cap of 5 GB.
If you do not have any other option (I mean broadband etc) and if you have a BSNL CDMA tower near your place, this is a pretty good option as it cost only 550 per month for unlimited internet.
Regarding EVDO - as per the info form BSNL, they are in the process of installing it, not completed. The difference is, ICC will be available all over India (wherever CDMA coverage is there), but EVDO will be launched in selected cities / places only (may expand it later).
Regarding roaming, sorry, I couldn't test it yet.
Also it worked perfectly in laptop and in PC (I used a PCI to PCMCIA adpater).