asparagui

self.tableView.backgroundColor=[UIColor clearColor];
	UIImage *backgroundImage = [UIImage imageNamed:@"about_background.png"];
	UIImageView *backgroundImageView = [[UIImageView alloc]initWithImage:backgroundImage];
	
	backgroundImageView.frame = CGRectMake(500, 500, 1000, 2000);
	
	backgroundImageView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
	
	self.tableView.backgroundView = backgroundImageView;
	[backgroundImageView release];

asparagui

UIImageView *tempImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"TableViewBackground.png"]];
[tempImageView setFrame:self.tableView.frame]; 

self.tableView.backgroundView = tempImageView;
[tempImageView release];