8800 and t-mobile internet ?

hay
i have an 8800 whit t-mobile service and i just added the 9.99$ internet plan .
i know i wont have the bbm and maps ,but can i use mini opera and g-mail application ?
will i be able to use a 3party program like shangmail for puse mail ?
thanks in advance

I've actually allowed someone to pop their T-Mobile SIM in my Storm to test if it would work without a BB package, and it did. Might be a case by case basis, though.