This is kinda cool, especially for those times when you need a nice simple way to go back and get data.
For example, we have used approaches like this when building a page which has to access various sources to get prices from many vendors, and we don’t want to “wait” for them all to come back before anything goes to the client.
In the past you would do weird things like displaying items, and then at the end, keep printing to the client, and print <script>// update that div with output now.
Streamlets are a lot nicer, however isn’t the industry ALL ABOUT Rich Internet Applications? ;)