Is it possible to download an apk from an email onto an Android 2.2 phone, and then run it The micro usb on my phone broke and I need to continue development of an application while I wait for the replacement. Can I send my program's apk package to myself then download it onto the phone and run it. If so, how might I accomplish this? Thanks for reading.
Absolutely.

The GMail app won't allow downloading of attachments (images and the like are only "previewed") but you could use a third-party email app or the GMail the website to get around that.  Be aware that unless you have something like Download Crutch installed, Android may not let you download APKs through the default browser.  You can just use Firefox or another browser instead.