Sentry Bundle Example (see here http://forums.laravel.com/viewtopic.php?pid=20075)

routes.php

/*
|--------------------------------------------------------------------------
| Register
|--------------------------------------------------------------------------
*/
Route::get('register', function()
	{
		return View::make('register');
	});

Route::post('register', function()
	{
		$input = Input::get(); //receive input
		
		try
		{
			//create some validation rules
			$rules = array(
			    'email'  => 'required|email|unique:users',
			    'password' => 'same:confirm'
				);
			//validate the inputs
			$validation = Validator::make($input, $rules);
			if($validation->fails())
			{
				return Redirect::to('register')->with_errors($validation);
			}
			else
			{
				unset($input['confirm']);			
		  		$user = Sentry::user()->create($input);
		  		if($user)
		  		{
		  			Return Redirect::to('login');
		  		}
			}
		}
		catch (Sentry\SentryException $e)
		{
			//create a real Laravel\Messages object from a sentry error.
			$errors = new Laravel\Messages();
			$errors->add('sentry', $e->getMessage());
			Return Redirect::to('register')->with_errors($errors);
		}
	});

/*
|--------------------------------------------------------------------------
| Login
|--------------------------------------------------------------------------
*/
Route::get('login', function()
	{
		return View::make('login');
	});

Route::post('login', function()
	{
			try
			{
				$valid_login = Sentry::login(Input::get('email'), Input::get('password'), true);
				if ($valid_login)
				{
					Return Redirect::to('test');
				}
			}
			catch (Sentry\SentryException $e)
			{
				$errors = new Laravel\Messages();
				$errors->add('sentry', $e->getMessage());
				Return Redirect::to('login')->with_errors($errors);
			}

	});

/*
|--------------------------------------------------------------------------
| Logout
|--------------------------------------------------------------------------
*/
Route::get('logout', function()
	{
		Sentry::logout();
		return Redirect::to('home');
	});

/*
|--------------------------------------------------------------------------
| Test
|--------------------------------------------------------------------------
*/
Route::get('test', array('before' => 'sentry', 'do' => function()
		{
			Return View::make('test');
		}));

/*
|--------------------------------------------------------------------------
| Filter
|--------------------------------------------------------------------------
*/
Route::filter('sentry', function()
{
	if (!Sentry::check()) return Redirect::to('login');
});