Text adventures on mobiles? With the bad text resolution, evily small screens.. I don't think it'd work too well. Those SMS games only work because its short bits of text every now and again. Staring at the screen reading lots of descriptive text then tapping in "take apple" on a mobile doesn't appeal to me one bit.
However, Text Adventures are cool, I'd been expecting them to make a come back for lunch time entertainment for a while.
As to using a database, sure.. why not. Writing a Text Adventure engine is pretty simple (I should think most people have done it once or twice, for me lots of times). Actually populating it out with an adventure, now that takes some time...