A good collection of links is Roger Clarke's eBusiness Home Page.
Larry Chase's Web Digest for Marketers Resource Center reviews the best tools and companies for Internet marketing.
Web Marketing Today will lead you to thousands of articles and resources about effective Web marketing.
Articles, guides, webcasts, and white papers are among the many resources available from the Digital Marketing Resource Center provided by Lyris. You can also sign up for their report on the 10 Trends that will Make or Break your Email ROI This Year.
The MCM Outlook 2015 is available by request, along with the earlier Ecommerce Research Reports for Outlook 2014 and Outlook 2013 from Multichannel Merchant.
InternetRetailer.com's Resource Library will lead to many reports and white papers on many aspects of ecommerce.