Below - in no particular order - are a list of useful blogs and websites that I find a source of useful information:
The Fiberglass Manifesto - dedicated to all things glass. Cameron Mortenson is perhaps responsible more than anyone else for the renewed interest in Fiberglass flyrods.
DIY Bonefishing - Do It Yourself Bonefishing is the world’s #1 source on the web for saltwater fly anglers looking for information on where and how to catch bonefish on their own. Catch up on the latest news and trips by visiting the Blog or check the DIY Locations section to find the perfect distination for your next trip.
Swift Fly Fishing - Home to Epic Flyrods, arguably the finest glass rods on the market today (good enough that April Vokey has bought into the business). And if you're up for the challenge - then try the "wrap your own" kits and catch the rod-building bug. Founder Carl McNeil is also an award winning documentary maker, whose credits include "Once in a Blue Moon," and "Itu's Bones" - and to top it all off he is a certified Master Cast. This guy knows fly fishing.
The Tongariro River Motel Daily Report - The TRM daily report has an almost cult-following by those who fish the Tongariro River. As the name suggests, it is run by Ross and Pip Baker - proprietors of the Tongariro River Motel, and it combines up to date reports on how the river is fishing, along with commentary on the state of all things affecting the fishery, not to mention a good deal of humour (especially Ross's comments about "SWMBO"). If you are planning a trip to the Tongariro then you could do far worse than reading up on the TRM's "50 pools to fish before you die" as well.
Outfitters - a list of online outfitters who I have dealt with, and whose service I rate.
Gorge Fly Shop - I have been buying all my high-end gear from these guys for about 10 years now. Despite being located in the US they offer very reasonable overseas shipping - and often have great deals on closeout items from the high end manfacturers. And their customer service is outstanding.
Superfly - This website sells pretty much nothing but flies - and has been around for as long as I can remember. Once you get past the retro website (which I don't think has ever changed) you will find perhaps the cheapest good quality flies on the market. Based in Turangi, Superfly has over 500 patterns available, with a pretty quick turn around. So if you find yourself short before a trip to the Tongariro, and don't have the time to tie up what you need, then this is a good option!