If you're still having any trouble, can you try clearing your browser's cookies and cache? Also, testing in Firefox safe mode or another browser may tell you something.

Let me know if you have any further problems.

Problem persists.

In IE, latest version, no plug-in's/add-on's, cache cleared, cookies cleared ---- http://blog.rememberthemilk.com/ results in page will not display.

In Firefox running on safe mode and cookies/cache cleared --- http://blog.rememberthemilk.com/ results in page will not display (error loading page).

I have no problems with either browser displaying any other pages.

Does this happen on other networks also?

What do you mean "other networks"?

Updated actions:
* I removed linksys router from betwn modem and desktop computer and connected to net directly via modem. Cleared caches/cooked again. Rebooted. Problem remains

* I ran cc-cleaner. No change.

* No good reason why but did defrag. No change

* Turned off firewall. No change.

* Turned off antivirus. No change.

* Added http://blog.rememberthemilk.com and http://www.rememberthemilk.com to firewall exceptions. No change.

* Used Firefox in safe mode, again. No change.

* Have a local server (dev only) running. Turned off. No change.

* Cleared windows temp files. No change.

* Tried to access using IE8. Can see two bars loading at window bottom and then halt. "IE cannot display the web page." (No change.)

* Pinged the IP of blog.rememberthemilk.com -- successful. (grr)

I am plumb out of ideas, except for starting up computer in safe mode and testing that.

Otherwise, I have zero problems surfing anywhere in either Firefox or IE. The only problem I have is with blog.rememberthemilk.com and http://www.rememberthemilk.com The latter does display if I use https

Can you think of anything else I might do/test?

All was fine until recently.

Regarding other networks, I meant basically what I had described on your other post about this issue. It could be something on your network blocking the content from loading. This could be your router's configuration (you covered that, so it's not that), or something on your computer that's affecting the display (you tested some of those things—firewall, antivirus, etc.). It would definitely be worth starting your computer in safe mode (with networking, of course) to test there, which would rule out any other computer-related issues.

Beyond that, it'd be helpful to try loading the site on a different network if possible (e.g. if this is a laptop, you could take it somewhere else and test). It may also be necessary to contact your ISP to see if there's anything happening on their end that would block/inhibit the content from loading.

Let me know what you find!