I also wanted to make room for more (like the upcoming "export to GPX"), so I made a minor change to the activity screen. Now you have one tab for the activity details, and one tab to export and share in various ways.
A few of you guys asked for a quick way to send an activity via email (without exporting to SD card etc.) That's what the new "Email" button is for. It will open your email app, and create a message with the activity file in attachment.
Sharing to Strava is still via email, as Strava has not released the API V3 yet. So it's basically like the above, except that the email will be pre-addressed to Strava, and you just have to send it.
Note that it may take a while for Strava to process your email. In some of my tests it took almost 30min, in others a few seconds.
The same features are coming to Sportablet soon.
Update: it seems that if you email an activity that is already on Strava, you get back an email saying:
Unfortunately we ran into a problem uploading your files. We had a problem with <some file name>. The activity data seems to be formatted differently than we expected. Please contact support or visit our support site if you need additional help.
Not exactly the right message, but ok, they probably send the same message for all the unexpected event. So, if you get a message like that, check that you haven't uploaded that activity before.