Marissa Mayer from Google only has 10 minutes to speak at Web 2.0 Summit, so she gives a high level look at Google's use of Ajax in applications. She notes that the key reason they created Gmail in Ajax was speed. This is a theme in Google Maps too. In terms of Google Videos, she says how instant something is and giving instant gratification is key - they used to make users wait 24-48 hours to see their videos after uploading to GVideo.

She asks what does speed mean for future apps? She has a slide that shows browser support - FF2 and IE7. Marissa says we'll see built-in support for client side languages (e.g. javascript). She says also that people will spend more time online, due to increase in broadband etc - and this is good for Google. Another point she makes is that mobile hardware will improve a lot.

In conclusion, she says speed is very important for web 2.0 and the future of the Web.