Two spring D.C. mucky-mucks of interest for online advocate types have early-bird registration deadlines approaching. The March 15-16 Politics Online Conference of the Institute for Politics, Democracy & the Internet has $375 registrations through Dec. 29. NTEN's Apr. 4-6 Nonprofit Technology Conference has, through Jan. 15, member and non-member prices $200 cheaper than it'll cost at the door.