One easy solution is web seminars, or webinars. A webinar is a way to conduct meetings or give presentations via the internet. They allow participants to both send and receive information via telephone, text, VoIP, slide show presentations, or live audio and video streams. No one travels and participation can happen from home or office or even your local Starbucks.
Webinars are an easy, cost-effective way to provide training to participants in your organization. The information is brought directly to them; no commuting, conference rooms, or working lunches, although you do miss out on the after lunch pastries. The Corporation for National and Community Service has an entire catalog of text-based webinars intended to assist non-profits after you have registered on-line. Nten has a great webinar on how to accept Amazon.com payments for nonprofits, available on-demand after registration.
Another way to make webinars work for your organization is to host them yourself; share your knowledge and get your groups name known as experts. There are multiple companies that provide all the tools you need to host your own web seminar, easily found by a simple internet search. Try DimDim or Webinar Objectives and How to Run a Successful Webinar.