Mailing lists and support groups are a great way to share information, ask questions, and stay in touch with a community of people who can mutually benefit from each other's experiences.
Support groups are usually a more immediate form of sharing and asking questions than mailing lists (though some might have a mailing list as part of the group). Questions are asked and answered online and they don't fill up your inbox with a bunch of unwanted messages.
SupportGroups.com has both Hodgkin and non-Hodgkin lymphoma support groups that are growing all of the time.