The Spark client looks good from what I can tell. It seems to work well, too. Good work guys.
It does, however, resemble Pandion (http://www.pandion.be) considerably. Have you guys worked with the Pandion people on developing this? What technologies are you using for the UI? It doesn’'t look like Swing so much to me. Is there any possibility these projects could converge and ultimately deliver a far superior cross-platform Jabber client that what is available now?