worship hubs

Recently I have been perusing the worship world for apps and connecting points for worship leaders, pastors and service producers.  I have been using Planning Center Online almost since it began and am a major fan, but I am convinced we have only reached the tip of the iceberg in terms of what is possible in worship service planning.

For those of you who are worship leaders, what online tools do you use in your planning?

For those of you who have bands, do you use online planning tools?  If so, which ones?

For all of the musicians out there, what hardware tools do you use (metronome, tuner, etc.) that you would love to see incorporated into an online tool or iPhone/iPad app?

In your ideal world, what would the perfect online tool or app for worship planning look like?