The Web Tools project has initial contributions from IBM (former WSAD plug-ins) and Lomboz available for download from http://www.eclipse.org/webtools/development/main.html. Genuitec the makers of MyEclipse have even provided some bug fixes to the initial IBM contribution.
Regarding my MyEclipse, many of the MyEclipse plug-ins are from the IBM contribution. MyEclipse does not have any fancy EJB wizards or editors. Most of the EJB functionality is provided by XDoclet.
Co-Author of <a href="http://www.amazon.com/exec/obidos/ASIN/1590591259/ref=jranch-20" target="_blank" rel="nofollow">Enterprise Java Development on a Budget</a>