I got my invite for the my.sketchup beta.
It’s an interesting toy and would be good for people interested in trying out sketchup before they want to actually install it on their machines. It gives you a super basic set of tools and zero options for plugins.
You can upload SKP files and download your project as an SKP but that’s it for file options. You’d still need to open the project in desktop SU in order to export a .STL or .DEA file
In short, I think it’s neat and could allow you to do some work when away from your usual setup like at a friend’s or at the library.. but if you’re doing any serious work on it you’ll want to stick with your desktop version.