TheNextWeb reports from GTUG in London with the Google Wave team, with a few announcements on Google Wave:

• Extension gallery to be fully up and running in months with a wider collection and sharing functionality.
• An extension store is planned where developers would be able to display and charge for apps.
• ‘Hooks’ that’ll invoke actions such as opening a new wave, menu, removing bots or launching a shortcut.
• At current, all waves are equal in the order they are displayed in your inbox, but in the future, they might be prioritised by certain groups, contacts and keywords to avoid a overflowing and indigestible inbox.
• Merging Waves, another feature on the road map.
• Google Wave will be able to be deployed within networks and intranets for organisations and companies to use internally.
• Although it has been requested by a substantial amount of preview users, there are no plans to intergrate Gmail or any mail with Google Wave. The APIs though, will provide developers with the ability to do it in the future…
• They are not developing or have plans to, a native iPhone or Android app and are concentrating on the optimised mobile versions.
• Auto spell checker is close, but according to Rasmussen, ‘the balance of quality’ is not quite there yet and there’s still a tendancy to have to back track too often.

The extensions gallery or the app store is not new as there is already such a gallery (except the billing part) now. You can access the extensions gallery via one of your first wave, which title “Getting started with Google Wave”, and clicking on Visit the Google Wave featured extensions.

The most interesting part in our opinion is the future availability of a Notification API, that anyone (web app, or client app) will be able to use (including Gmail, but also Twitter or any real-time client). That means that Wave will become instantly linked to any other communication platform !