Well, now you can; with rbLAN.
Completely ajax-driven.
Cross-browser compatible.
Cross-device(Mobile(iPhone, iPad, etc.)) compatible.
rbLAN (rblanx.com) is a lan-party tool for on-the-fly scheduling of upcoming events/games, for up to 72 hours.
This tool is purely a "FYI" service. (No attendance expectations. No sign-up system. etc.)
This tool is ideally for short lan events (up to 4 days) only.
How it works:
Basically, you leave this tool running (full-screen) on a PC (with screensaver disabled) somewhere in your LAN. (Perhaps a dedicated PC, that anyone a) can see from distance, and b) use themselves)
People (that walk by) will see the big timer bars on the PC screen.
The bigger the bar, means the closer the event gets to it's start time. Full bars means that the event is ready, and/or has already started.
Events (that have reached their time, and begun) will be removed from the screen after 30 minutes.
This tool automatically refreshes the screen every 30 seconds.
How to use it:
- Click "Add Game", select the game and select when it starts, then click Submit.
- You can set a "note" by clicking "..." button. E.g. "12vs12", or "Talk to Dolphin", etc.
- You can Delete your own games/events.
- You (as owner of the lan/group) can edit Settings for everything.
- You (as owner) can set the lan/group to private mode(set a password).
Unlike traditional "event scheduler" systems (where you have to deal with a "calendar popup"), rbLAN takes an easier approach by which you select # of hours (for when your game/event will begin in). E.g. Simply select "2 hours", to set your event to start in 2 hours.
NOTE: If you haven't used it before, then:
- Type in the group name "garagelan", or visit directly at: http://www.rblanx.com/garagelan
- Type in group password "garagelan", press Enter. (Yes, I have it set to private even though it doesn't really need to be unless trolling occurs. The only reason it's currently set to private mode right now, is because for development/demonstration purposes.)
History:
I originally developed this to be for garagelan only; because it only took around 5 hours (to do something that was restricted to one group only (with hardcoded config, etc.)). But, then I decided to upgrade it (additional 25 hours) into something that could be used by multiple groups; implementing dynamic lans/groups (along with an intro screen("type in group name")), dynamic settings, dynamic administration, access system, private lan/group system, lan/group password-protection system, etc.
Screenshots:

Adding a game/event.

Game/event added.

Multiple games/events.

Settings.
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Well, there you go.
Up to you guys if you want to use it (find it useful or not). I'm leaving it alone now, and it will remain (run forever) at rblanx.com. I will still fix any reported bugs, though.
I personally will be using it and leaving it running on my screen(for if we don't have it running on a dedicated-lan PC screen) at lans. For example, me and my friend may plan to play SC, and we'll be willing to schedule it (even though we have no expectations that anyone will show up; but we know it's always possible someone may take an interest), using this tool. Anyone walking by our screen(during that time) will/may see it, and make a mental note(adjust their personal schedule to follow up on it), and they may follow up on it when the time comes(whether it be 2 hours, or 4 hours, etc.)