Yes Swype keyboard (Beta) is available for Acer Iconia A500, but getting it is a little tricky.
First go to Swype | Get Swype
and click on Download Swype beta.
You need to register and they will send you an email which you will need to complete the registration.
If, when you click the link in the email they send, it tells you that your tablet is not a phone, check in your browser settings are set as mobile instead of desktop in advanced settings/ viewing mode.
the installer Swype-Installer.apk will download. If you lose track of it, it is in your download folder. You will need a file manager app to locate it (I use File Manager HD).
You also need to allow install from unknown sources in settings/ applications.
The installer should then download the actual program from swype, you need to log on with the ID number in the email they sent you at some stage in the process.