Jeff, it had nothing to do with guru-ness on anybody's part. Frappr/Palatial went out of business.
On my own part, I'd say it would've been nice if a blurb on their home page had alerted new members to the fact it wouldn't be there in couple months. inviting them to join the map ... and then WHAM! it's gone. In a couple months' time, FABO had one of the biggest maps on their whole site.
I've looked a couple times for other interactive mapping programs on the internet but haven't found anything yet. Anybody else wanna give it a try?