Welcome Andy!
At the first meeting of the CinARC group we discussed what an Architect was. What we found was that there are a LOT of definitions and in the end there was no clear cut answer. There many roles that people could definately point to and agree with that an Architect would do, but other roles were very contentious. It sounds like you are very interested in learning more about application and solution design more than you are interested in "being an architect". I think the path you are interested in is more around becoming a team lead or development lead so that you are getting more involved with the technical design of the systems you are working on. Feel free to correct me if I'm wrong.
As for resources, well, this is a great place to start! I would recommend that you use your strengths to your advantage. If you learn well from books, then I'd highly recommend picking up a book on Software Patterns (either the canonical "Design Patterns: Elements of Reusable Object-Oriented Software" or, my favorite, "Head First Design Patterns"). I'd also suggest picking up Code Complete 2. Also, you may want to start looking for websites that publish architecture or design related articles and news. InfoQ is one. There is another site in the works as well. If you learn more from "doing" then I'd highly recommend selecting different technologies that you aren't familiar with and starting playing with them. The more you learn about the different technologies the more you'll be able to make good decisions on if it's a good fit for a project or solution.
If you can work them into your schedule I'd also start watching for local events, Day of .NETs and code camps as way to get free training. MSDN has some events and specifically for architects and aspiring architects there is the ArcReady series (www.arcready.com). Conferences can be helpful too, but they can be expensive and usually require travel.
As for certifications, you'll want to look very hard at the criteria of the MCA certifications. Last time I checked they are much more than taking tests like the MCPD and MCSD certs. Someone described it to me as more like getting your masters.
Finally, start attending the CINNUG and CinARC meetings. The CINNUG meetings will give you exposure to technologies at the "how do they work" level, while attending CinARC meetings will give you exposure to what some of local architects, aspiring architects and developers are thinking on a variety of topics. Plus you'll be networking with people that are very interested in design. It's free and you get pizza too! :)