Firstly, froyo app2sd is utter garbage compared to darktremors script, I dont know if you know that. Froyo app2sd does not completely put the app on the sd card. Even with the froyo ally, darktremor should still always be used. I saw apps still on the data portion of the internal nand and not on darktremor when it was turned on on the nexus one. I may be wrong but it would be great to find someone that could give me a definitive answer.