I was only able to get the file through the organizer with the latest 2.0 SDK (I haven't tried the 2.1 yet). To test the file creation you can use the simulator and check ~/Library/Application Support/iPhone Simulator/User/Application. In there you will find the folder for your application and the Documents folder within that.
To get the path I am doing
NSFileManager* fileManager = [NSFileManager defaultManager];
NSArray* docDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
if ([docDirectories count] > 0)
{
NSString* docDir = [docDirectories objectAtIndex:0];
const char* cDocDir = [docDir UTF8String];
}
Then I use standard fopen, fread, fwrite, etc for the file access.
Stephen