David Berlind is organizing a Mashup Camp and seems to be getting a lot of interest. David indicated to me that some people are interested in talking about IDE’s for building mashups.
A project I would love to see started at Eclipse is one that focuses on frameworks and tools to make it easier to build applications that use eBay, Google, Amazon, or any other service. Waybe Beaton has been buidling an eBay demo. Mashup Camp might be a really cool place to kick start such a project. If you are interested in going Mashup Camp send an email me at david.berlind@cnet.com and Doug Gold at velogold@gmail.com.