A hosted Wiki solution to coordinate and communicate - a "situated app". Excel is definitely the whipping boy at DEMO - Jotspot uses an Excel sheet to explain why using flat lists is not the way to go in a collaborative environment with dynamic information.

Jotspot allows custom applications to be generated in a matter of minutes. Import Excel data, select from modules including a calendar), and you have a working application. Jotspot offers version control so accidental deletions can be backtracked - every version of every page is saved. Every page and every table in Jotspot has an RSS feed to provide alerts when information is updated or added. Files can be added using desktop drag and drop from Windows or Mac OS PCs. Every page in Jotspot has an e-mail address you can CC from Outlook or another mail client and have the correspondence added to the repository. Cool feature: data from online information sources like Hoover's or Salesforce.com can be integrated into each person's record.