This article lists some interesting tips/guidelines for Web 2.0 sites:

1. Liberate content and services via a public, open API. Content will continue to be separated from the experiences that mediate access to it, this makes adaptable experiences possible. Example: RSS readers let users consume content in the ways they choose and have control over. Doing this turns your Web application into a platform and is one of the most important habits of highly effective Web sites.

Up until now I’ve been using Thunderbird as my main news reader. It’s been convenient to consider “news” and “emails” as similar content and check them both in the same software. However, because my news reading history has only been kept locally, once I get home I can’t tell which ones are read.

Here are some steps to get images out of Picasa, and into Gallery 2.

Export from Picasa

1. In Picasa, select the photos you wish to upload then from the top menu choose Folder/Export as HTML Page. Note that if you're exporting an album, it will be Album/Export as HTML Page.
2. Select the required image size and click Next.
3. Select XML Code as the Web Page Template, then click Finish.

I've been looking at some different open-source systems, trying to decide which one I might use.

Mambo/Joomla
Pretty neat and tidy admin interface and the templating system is fairly easy. Tends to be based more toward news entries rather than longer static content. As with xoops, it has a rigid section/category system which, for a simple website, just gets in the way.

Typo3