I checked the BNC (British National Corpus), and I have found a number of such occurrences:
Perverse unreasonable Pamela, begone from my sight and know as well
how to behave in a hopeful prospect...
...many actually had art galleries and museums under their care as
well, providing an early example of multi-media provision...
The comma is also not obligatory. Certainly, the most common cas is the structure as well as.
Between, you can use it at the beginning as well:
As well as Germany, Japan, Switzerland, Sweden, Spain, Canada, Italy
and Holland all dump the deadly stuff here to be converted back into
more nuclear fuel.