Multi-line UITableViewCell using UILabel

No need for UITextViews or custom UITableViewCells. You can use standard UITableViewCellStyles and make the detailTextLabel accept multiple lines and specify its line break mode. The code would be:

static NSString *CellIdentifier = @"MyCell"; 
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
 cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue2
     reuseIdentifier:CellIdentifier] autorelease];
}
cell.textLabel.text = @"Label';
cell.detailTextLabel.text = @"Multi-Line\nText";
cell.detailTextLabel.numberOfLines = 2;
cell.detailTextLabel.lineBreakMode = UILineBreakModeWordWrap;

You will also need to return a suitable height for the multi-line cell. A height of (44.0 + (numberOfLines - 1) * 19.0) should work fine.