pacrafts.org) is a good example of a website for a guild or group.
The site is cleanly designed and easy to navigate. It's got all the expected features of a modern website (tie-ins to social networking pages, e-mail list signup, calendar of coming events), without being flashy.
In its current form, the site does a great job of serving the needs to visitors and the general public.
There seem to be many more pages and features planned in the Member Resources area; we look forward to seeing the site when these are complete.
For sites that do a good job of providing services to their members, see our post on the Boulder Potters Guild and Orchard Valley Ceramic Arts Guild, in June 2010).