Math Jax

MathJax is a web-based JavaScript application that you can use to include LaTeX in your web pages, like the following.
\[ \cos^2x+\sin^2x=1 \]
\[ \int x \, dx = \frac{x^2}{2}+C \]
No GIF's to export, no complex, additional markups to learn etc. It just works!
If you want to use it in Blogger, click here. Planning to use it to create more math pages with interactive features, using Wolfram Alpha widgets and GeoGebra.

Online LaTeX Editors

Although my primary word processor is MS Word 2007 for class materials, I use LaTeX for assignments in my upper level courses. Many of the assignments I create are not too lengthy and so I started searching for a quick browser-based online LaTeX compiler. Here are three I am experimenting with. The first one is totally free. The other two offer a free limited version.

• latexlab.org : works with your Google account sign-in, but it's not affiliated with Google. Advantage is that your tex files are in the Google docs folder. I found the previewer to be somewhat clunky and it seemed to run the slowest of the three I found. But it is free and has no restrictions.
• scribtex : worked very quickly on my sample latex file and rendered a nice PDF file in a separate tab. The interface is very minimalist, though. The free account has restrictions, but will be fine for my use of creating assignments
• verbosus: Has a nicer interface than scribtex, with the tex file and pdf file side by side, but a lot of the window's real estate was taken up with file and project windows. Maybe there is a way to customize it, but I didn't check it out. The free account has restrictions as well.

 I think I'll work with latexlabs and scribtex for now. But I thought verbosus was worth checking out.