Make a remote view. Than in the field properties dialog box select the BLOB field and change its type from general to memo. Now any binary data could be put into the memo field (you can get file into a string using FileToStr(), and back using StrToFile() function).
I was under the impression (mistaken it seems) that the MS ODBC driver for Oracle did not recognize the BLOB data type in Oracle. I fact I remember reading a MS KB article a few months ago that stated that. Has everything changed or was I just wrong?