Sending out pings does help you to get your lenses indexed by google, but what about other sites?
I use squidutils to ping my lenses, but if I’ve done a blog post I often used to ‘forget’ to ping it, the same with my hubs and articles that I’ve written. The solution is to use another ping tool and the one I generally use is pingomatic. I’m not sure if it’s the best, but it was one I was recommended and I’ve found it works well.
I have seen pingoat recommended on squidu, but I haven’t tried it. So don’t just ping your lenses, ping everything :)