That's pretty cute! I like it! It's straightforward and that's definitely a plus.
So I'm a newbie, so please other jump in to add your opinion/experience about this as well. Since I'm new to the virtual assistance arena, I can only give opinion based on my communication studies experience:
The only thing that I would think that may be negative about the name is that it may "pigeon-hole" you literally into "as needed" services and you may end up with spotty clients that may not stick around long term. For example, they may only call on you when they literally are short of hands or in rush, emergency situations rather than using you a resource to take some of their workload to better their business. They may not think the extra help is needed until they are in dire straits. It's almost subliminal in nature, you know?
I think that it all depends on how you market yourself. I think that if you make sure to express your worth and value and how you can make their business run more smoothly by working together as a cohesive unit, you will probably get more solid clients that will be repeat customers. Create your necessity and you will be "more needed" by your client.
That said, I still like your name and tag line a lot, just make sure that you market yourself as a necessary component and you will be fine