There are other ways to get the apk on your device and I tried some of them.
I didn't get it working!
Problem is the resolution:
1024x600 - It's the same resolution as the Galaxy Tab which comes with Swype.
But you have to substract some space for the softkeys. So the 'visible area' is something like 980x600.
800x480 - same resolution as on other devices but also you have to substract the softkeys, i think.
I think at the moment there's no swype version which supports those resolutions! :-/
I only tried on 101.
But to get the beta link working you have to switch off the "Desktop User Agent" in the default browsers preferences.
So you could try on your Archos 70 and report back!