My mate Mohammad Akif in Microsoft Canada is doing a sterling job helping folks aspiring to become Software Architects by providing a gentle introduction to common methodologies and software architectures. Visit his Blog to see the full list of upcoming Webcasts in the Aspiring Architect Series - 2008! These will run, one every day, from June 16 - 26, 2008.
For those of you new to this field, definitely plug into The Microsoft Architects Journal as well. We have a ton of very useful material you will benefit from regularly.
If you want more visit the MSDN Architecture Center.