[AndrewO]

I love Trello. I've been using it to plan my wedding. At first my fiancee was worried that it would add too much overhead. (She was never overly concerned that it was spectacularly nerdy to be using a software project planning suite—and that's a sign I found a keeper.) It's really shined with the guest selection/invitation process.

We created a couple of lists to group and sort guests into Definite, Good to Have, and Maybe lists and used labels to relations to whoever wanted them, which really helped with the friends and extended family that the other didn't know. We used checkboxes to track addresses that we were waiting on, who's save-the-dates have gone out, etc. I've used the API to total up people for the headcount (since cards we often for "Jack & Jill Smith"). If we were doing assigned seating, we'd probably make lists for each table and move the cards around. Thankfully, we decided to go for heavy hors d'oeuvres.

The thing's versatile: very few things feel like they're driven by the project planning domain (e.g. voting for cards). I'd love to see some kind of ability to embed scripts and save some checklists as templates that I could apply to cards with one or two clicks, but the API access suites my needs right now (and I know some people are using Greasemonkey scripts).