If you want to get Gmail, you dont need an invitation anymore. Just type your cell phone number at this link and Google will send you a code to register. Besides the 2.8 gigabytes of free storage Gmail is also a portal to others Google services like Google Docs & Spreadsheets, Calendar, Chat etc. I have a Gmail account and I recommend that you get one too, so you can easily keep up with new products from Google.
Gary Price at Resourceshelf also points out to other email services with free storage.
One of Google's competitors Microsoft announced today that their new Windows Live Mail will be renamed back to Windows Live Hotmail. "As we prepare to launch the final version of our new web mail service, we recognize the importance of ensuring that our 260+ million existing customers come over to the new service smoothly and without confusion," explains Windows Live Hotmail senior product manager Richard Sim. More details are available at CNET News.com.