I think that the Field Bryology's colorful photographs and accessible writing style makes this a great publication for interested amateur bryologists. Their website has a large number of other resources. I would highly recommend checking it out if you are in search of additional bryophyte information on the web. They also list the many field-trips that they have to look at bryophytes across the English countryside. The community appears to be really active and I think that it is great that they get out into the field so much.
Speaking of field trips, we will be out in the field this weekend for the Bioblitz 2009 in Hartford, Connecticut. For more information check out the link at the side bar or drop me an email (email@example.com)