Support selecting a batch of contacts/users and performing actions on them (add to group, delete, send message, merge, etc.).

Allow users/members to RSVP for events. Options could include:
• Attending
• Not Attending
• Maybe Attending
• Interested
• Bringing additional guests (#)

Provide an interface for searching and linking to photos from Flickr so they don’t have to be re-uploaded to the Wayground websites.

Provide a mechanism for users to define relationships or associations with other users.

Provide ways for users to then use those associations, including sub-groups of associations. E.g., “invite my friends in Calgary to this event”, etc.

Define filters to turn uploaded documents (RTF, PDF, TXT, CSV, DOC, etc.) into web page content.

Bonus points for handling text style sheets well.

Super bonus points for extracting and including graphics.

Use SMS for alerts, notifications and event reminders. User configurable, of course.

Provide a way for users to define ‘signatures’ to be attached to messages they send.

Automatically update user/contact records when email messages to them bounce.

Allow for the creation of custom web forms. Submitted entries either sent as an email to an address set by the form creator, or saved in a custom database.

Send reminders of events to users. Should probably only be used for users who have RSVP’d or been invited to an event.

Add support for tagging items (pages, events, weblinks, whatever).

• Options for item owners to specify whether other users are allowed to add tags.
• Allow for multiple users to add the same tag, so it doesn’t go away unless everyone who added it removes it, or if the item owner or an admin removes it.

keywords: tag, tags, tagging, folksonomy, category, categories, categorization, index, indexing

Have a way for files/documents to be uploaded and shared privately.

Stats, including charts, showing usage of the websites. Top pages, top search terms, top referrers, average page views per user/session, etc.

Share as much event data as possible with other websites, such as Upcoming, Facebook, Meetup, etc.

Both directions — loading event information originating from other websites and posting events added to Wayground to those sites.

Also, tracking updates to those events so that changes on one site are propagated to the other(s).

RSVP tracking across sites would be useful, too. (Although, obviously complicated.)

Allow for some pages to be designated as wiki-pages so that multiple users can edit them, and the changes will be tracked (“page history”). Allow for choosing between open (anonymous) access, any registered users, only authorized users, or only site admins/staff, for access.