NSNotification observing with blocks

NSNotificationCenter+CHAdditions

#import <Foundation/Foundation.h>

@interface NSNotificationCenter (CHAdditions)

+ (void)addObserver:(id)observer forNotificationNamed:(NSString *)notificationName withBlock:(void (^)(NSNotification *note))block;

@end

#import "NSNotificationCenter+CHAdditions.h"

@implementation NSNotificationCenter (CHAdditions)

+ (void)addObserver:(id)observer forNotificationNamed:(NSString *)notificationName withBlock:(void (^)(NSNotification *note))block {
    [[NSNotificationCenter defaultCenter]  addObserverForName:notificationName 
                          object:nil
                           queue:[NSOperationQueue mainQueue]
                      usingBlock:block];
}

@end

Considered a category on NSObject but felt that violated the purpose of NSNotificationCenter.
Slightly less messy, doesn't extend your notification handling code so far to the right in your editor.