The Second Life Architecture and Design community now has its own forum, as well as a place you can upload and share your favorite screenshots and machinima! Please visit http://slarchitecture.ning.com and join the network (it’s free and very easy). The benefits of this new feature are many, and will enable members of the community to easily communicate with each other and contribute their own content.
I would also like to remind members of the SL Foundations wiki, co-founded by The Arch and Virtual Suburbia, which is a great place to learn about cool builds, quick tips, resources, scripts, textures, transcripts, tutorials and more. Most pages are free for anyone to edit and contribute. If you come across anything that you feel might be useful to the community please feel free to post it there!
Also, be sure to subscribe to the shared Google Architecture in SL calendar, and let us know of upcoming events we can add to it!