You can check availability in bulk at moniker or whiz.in. No place to check expiration in bulk; you will need to do that yourself or using commercial software.
Of course none of the premiums are available -- if they have already dropped, then they have been registered. If their whois information says "pending delete," you can expect them to drop in the near future (even then, the window before they are taken is seconds -- so you will have to be extremely quick).
Very true Jagusa... perhaps, now I consider myself to be lucky enough to have caught hold of some great .INs as original registrations like Del.IN, IDs.IN, IIT.in, Chd.IN, Hindus, Muslims, Sikhs & Christians.IN, DotCo.IN, 006.IN, Yog.IN and around a hundred other generic one-word and number .INs like 9000.IN
Let's see which way the wind blows...