Josh Points to XWT, the XML Windowing Toolkit. It lets you write remote applications -- applications that run on a server, yet can "project" their user interface onto any computer, anywhere on the Internet. It already speaks XML and uses XML-RPC and has a mail client already written, modifying it to interface with the XMT API (or, the SOAP version that will emerge from it) should not be too difficult and would get us a quick cross platform client. The only problem is that XWT is significantly slower than an app already on your computer, and, on my mac at least, it tends to just open blank windows from jar files that I can only kill from the command line. ew. [weblog.masukomi.org]