> Y'all just make this too much fun!  I'm looking forward to playing
> around with this feature.  I did create a quick and dirty little
> gadget that takes an address, gecodes it and publishes the lat/long in
> the geoinfo group as a test.  It works with the existing Listening
> Map.  Will do more later.  The URL ishttp://mikeg101.googlepages.com/mylocation.xml

> Things I have noticed...

> 1.  I installed the PubSub tab to start playing around.  My Gadgets
> insists that nothing is cached, but I had a heck of a time getting by
> the cache on my new gadget on the PubSub tab.  Had to do things like
> remove the gadget, add it back, reload it and just keep hoping.  I
> have not noticed this on other tabs.  not yet anyway.  I'm using
> Firefox 2.0.0.6.

> 2.  Will group names be reserved like channel names?  It looks like
> geoinfo will become a standard group name for talking to maps.  Or is
> it up to developers to coordinate this?

> 3.  It's late and I can't recall my third point, so I'll close by
> saying that this is cool stuff!  Thanks!

> On Aug 23, 6:52 pm, "Dann (Google Employee)" <d...@google.com> wrote:

> > Hey everyone!

> > I'm proud to announce "Gadget-to-Gadget Communication", otherwise
> > known as PubSub, which is a killer new beta feature that's currently
> > available for you all to try out!

> > ====
> > What is "Gadget-to-Gadget Communication", a.k.a. PubSub?

> > PubSub allows multiple gadgets on the same page to send and receive
> > data from each other.  In other words, you can now build a gadget that
> > communicates back and forth with one another.  This introduces a brand
> > new concept and strategy involved when writing gadgets.  Information
> > is no longer constrained to fit inside a single gadget.  Instead, you
> > can now split up various pieces of information amongst multiple
> > gadgets and allow them to communicate with each other to paint a
> > bigger picture.  Gadgets now have the ability to be more closely
> > integrated with one another and present a network of information to
> > users.  If users only care about one particular segment, they can
> > simply remove or minimize any gadgets containing extraneous
> > information that they don't care about.

> > ====
> > How does PubSub work?

> > PubSub is a new framework which allows 'publisher' gadgets on iGoogle
> > to communicate changes to 'subscriber' gadgets that have declared
> > interest in those changes.  This is currently available only on
> > iGoogle and publisher/subscriber gadgets must be on the same page.
> > For a list of current issues and limitations, see more information
> > below.

> > Here's documentation on how to get to started:http://www.google.com/apis/gadgets/pubsub.html

> > Here's an iGoogle tab you can add to quickly see some simple examples:http://www.google.com/ig/sharetab?source=stb&atr=PubSub&n_32=url%3Dht...

> > *Note:* As a beta feature, documentation on PubSub is not currently
> > linked to from the Google Gadgets API developer guide or anywhere
> > else.

> > ====
> > What's a BETA-feature?

> > It's an early release of a feature in order get valuable feedback from
> > real gadget developers (all of you) about the current design along
> > with some ideas on how to make it better.  We can't promise that you
> > won't encounter any bugs since it's still a beta.  However, when any
> > changes arise, we'll notify everyone about the change by posting it to
> > this thread.  We're thrilled to hear your opinions on the design as
> > well as any creative ideas on how to use it.  If you have any
> > questions or comments, please let us know.

> > In the meantime, here's the current list of limitations and known
> > issues:
> > -- Need more practical examples.  Coming soon.
> > -- Does not work in Safari.  Works correctly in Firefox and IE.
> > -- Only works in iGoogle.  Does not work on third-party websites or
> > other container pages such as Google Desktop.
> > -- Only available to type="html" and type="html-inline" gadgets.
> > -- Does not work consistently when multiple inlined (type="html-
> > inline") "subscriber" gadgets exist on the same page in iGoogle.
> > -- Moving (drag/dropping) a "subscriber" gadget to a different
> > position in iGoogle creates an error.  PubSub ceases to work
> > afterwards.
> > -- The "finance_symbol" channel described in the documentation is
> > currently broken.
> > -- Publisher gadgets cannot pass empty strings to subscriber gadgets.
> > -- JavaScript error is sometimes thrown when loading gadgets on
> > iGoogle.
> > -- Browser 'Stop' buttons sometimes have strange flickering behavior.

> > ====

> > As always, please reply back with any feedback or comments you may
> > have.  We'd love to hear from you!

> > Have fun!

> > Dann