Planet Eclipse is the go to place to get first hand information from the vast Eclipse community.  You can learn the direction of Eclipse and how it affects Lotus Notes going forward.  You can also learn a lot of tips and tricks you would not normally get in product documentation.  I know many on the Loti are diving deep with Eclipse but I think there is a lot more  potential and opportunities for business partners and companies if they put some attention to PlanetEclipse.