In UITableView, cell.detailTextLabel.text isn't working… why?

Your initialization needs to be changed to this:

cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle 
                               reuseIdentifier:CellIdentifier] autorelease];

I've emphasized and bolded the part you need to change.

You need to set the cell type to Subtitle when you allocate it.

if (!cell) {
     cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:BasicCellIdentifier];
}

When using Xcode 4.2, set the Table View Cell style to Subtitle in Storyboard. dequeueReusableCellWithIdentifier will return an instantiated cell.