My personal two cents is that if you’re already using any of the hundreds of blog or CMS platforms out there which already ping the main sources like google/yahoo/msn upon site updates (or better yet will ping one of the services listed above which actually notify multiple sites with that single ping), then i’d say there’s no real benefit to re-pinging these sites. If you’ve got content, esp. if it’s new (even better if it’s new AND unique), then the spiders will pick-up on it + spread the gospel for u.

But as a very short answer to those of you with homegrown sites or those who want just the easiest method of using xml-rpc… yes, i’d say just use pingler. :)