Screen Resolutions? What size fits most

Just a question for everyone. I am in the  process of redesigning the layout of our standard look and feel for most of our Lotus Notes applications. What resolution do you think can be accepted as the normal? We used to design for 800x600 but I think that going up to 1024x1280 is probably reasonable nowadays. However I would probably like to go to a higher resolution again but that might be pushing it. Anyway if you have any thoughts on what should be the average resolution I would appreciate it. 

Lotus Notes on Linux

IBM have just announced the release of Lotus Notes 7.0.1 for Linux. This offers a real alternative for those sites that use Windows only because they want the Notes client. I know of a couple of clients that have wanted to do this for many years so it is great news.The software will be downloadable via Passport Advantage starting on July 24, 2006. Those organisations already licensed for a Lotus Notes client get it for free. Another exampe of IBM adding real value with Notes 7.

Some more info:
http://www-306.ibm.com/software/swnews/swnews.nsf/n/nhan6rfrrb?OpenDocument&Site=software
http://news.zdnet.com/2100-3513_22-6091872.html
http://crn.com/sections/breakingnews/breakingnews.jhtml?articleId=190301221