gistfile1.sh

#!/bin/bash
# this is the script you would use for generic GMail addresses..
echo "[email protected]"
echo "--------------------"

curl -u [email protected]:YOUR_PASSWORD --silent "https://mail.google.com/mail/feed/atom" | perl -ne \
'
        print "Message Count: $1 \n\n" if /<fullcount>(.+?)<\/fullcount>/;
        print (($title - 1) . ". $1 ") if /<title>(.+?)<\/title>/ && $title++;
        print "(from $1)\n" if /<email>(.+?)<\/email>/;
'

gistfile2.sh

#!/bin/bash
# this is the script you would use for Google Apps based email addresses.
echo "your_email@your_domain.com"
echo "--------------------------"

curl -u your_email@your_domain.com:YOUR_PASSWORD --silent "https://mail.google.com/a/your_domain.com/feed/atom" | perl -ne \
'
        print "Message Count: $1 \n\n" if /<fullcount>(.+?)<\/fullcount>/;
        print (($title - 1) . ". $1 ") if /<title>(.+?)<\/title>/ && $title++;
        print "(from $1)\n" if /<email>(.+?)<\/email>/;
'

If you want to make this a little bit more secure and don't like having your account passwords stored in the file, take out the :YOUR_PASSWORD and this script will prompt you for your password every time you run it.

Nice! I didn't know that GMail provided an atom feed, very handy.

Yeah, I was amazed as well. I found this technique in an article on 10 Useful Commandline One-Liners. I made a bunch of tweaks to their style and decided to store my password in the script so that I don't have to keep typing it every time (I run the code on my server, and if that gets hacked, I'm basically screwed anyway... so meh)