Gmail vs Pine
Snarfed has an interesting review on Gmail vs Pine. From the article: "I've used Pine as my email client for, well, pretty much forever. I use it because it's fast, powerful, stable, and very keyboardable. (I hate the mouse.) However, since I work at Google, I'm constantly bombarded with people who ask me why I don't use Gmail. After hearing the nth person brag about how much it increased their productivity, I finally broke down and tried it. I didn't expect much, since I've never liked web-based email clients. However, I made myself use it as my only email client, for a month, to give it a fair shot."
Here's why I use gmail (over PINE):
Also, this is a comparison of a completely integrated package (gmail) with a Mail User Agent (MUA). I think for my purposes I enjoy finally letting someone else manage all of the pieces for me. I still have my personal favorite MUA for transferring all of my gmail to local storage and archive (just in case something goes terribly wrong) but so far I think gmail is a great piece of work.
pine + PortaPuTTY + a thumb drive
It can be used anywhere by just plugging your thumb drive in with the security of SSH. And you get the benefit of no targeted advertizing (And no company aggregating your life's communications...)
the article appears to be slashdotted already.
Your sig(k) has been stolen. There is a puff of smoke!
OK, can gmail do PGP?
Not directly, but by using the GNOME Panel Applet included with Seahorse 0.9.0 you can perform all the usual encryption operations on the contents of the clipboard. Your private key will never leave your personal comuter.
Even Marissa Mayer Google's VP of Search Products and User Experience uses PINE for her business email:
Sorry about the crappiness of the website I linked to, but CNN doesn't know how to design for FF yet.