On Monday and Tuesday, the IRS will host a phone forum on rules for tax-exempt organizations.  As of this writing, the IRS website says that there is still room on the June 10th call. 

The IRS invites tax professionals and representatives of tax-exempt organizations to participate in a Phone Forum on Rules for Tax-Exempt Organizations During An Election Year.  The Forum is scheduled for June 9, 2008, and will be repeated June 10.  It will discuss the distinctions between political activity, lobbying and general advocacy, and which activities are permissible by 501(c)(3) charities, 501(c)(4) social welfare organizations, 501(c)(5) labor and agricultural/horticultural organizations, 501(c)(6) business leagues and trade associations, and 527 political organizations.  Registrants will have the opportunity to submit questions, in advance, to be answered during the sessions.

Both forums are being offered at no charge to participants, although space is limited and will be reserved on a first-come, first-served basis. Organizations with multiple representatives interested in participating are encouraged to register as a group, rather than as individuals.