MyCellController.h

@interface MyCellController : NibBasedCellController {
    Class _controllerClass;
    GithubAccount* _githubAccount;
}
@end

MyCellController.m

// Would be nice to make some assertions about newControllerClass 
// (must be a UIViewController that conforms to protocol GitHubAccountAware
- (id) initWithControllerClass:(Class)newControllerClass account:(GithubAccount*)account {
  if( self = [super initWithNibName:@"MyCell" bundle:nil] ) {
    self.githubAccount = account;
    _controllerClass = newControllerClass;
  }
  return self;
}

//So that instead of all the respondsToSelector malarkey to keep the compiler happy
//like here
- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
  UITableViewController *tableViewController = (UITableViewController *)tableView.dataSource;

  NSObject* controller = [[[_controllerClass alloc] init] autorelease];
  if( [controller respondsToSelector:@selector(setAccount:)] ) {
    [controller performSelector:@selector(setAccount:) withObject:self.githubAccount];
  }
  [tableViewController.navigationController pushViewController:(UIViewController*)controller animated:YES];
  [tableView deselectRowAtIndexPath:indexPath animated:YES];
}

//I could safely do this.
- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
  UITableViewController *tableViewController = (UITableViewController *)tableView.dataSource;

  UIViewController<GithubAccountAware>* controller = [[[_controllerClass alloc] init] autorelease];
  controller setAccount = self.githubAccount;
  [tableViewController.navigationController pushViewController:controller animated:YES];
  [tableView deselectRowAtIndexPath:indexPath animated:YES];
}