Has anyone heard of Go2abstract?  I just received an "order" from them that is so cryptic I won't work for them without references.  It contained no full company name (just a return email address), no address, no phone number, a first name only in the signature line, and I can't find anything when Googling them.  I wrote them back and told them I would need all this info before we could consider working for them . . . but I would also like any feedback anyone else has.  Thanks in advance.