As per Metalink Note 786800.1, if you are on 10.2.0.4 Solaris SPARC-64 bit, you have to apply patch 8290506.
There are no new patches for IAS or Developer 6i. You are ok, if you applied October 2008 CPU for these technology components.
Only two ATG patches 7836886 and 7582828 are needed for E-Biz.
Patch 7836866 has only one script called $FND_TOP/patch/115/sql/fnddefpw.sql
This script will list the default (seeded) applications users that still have their default passwords.
You should change all the default passwords, even if the user is "END_DATEd".
Patch 7582828 has 5 OA Framework class files
We can at best guess what these files do and do a basic testing of OA Framework pages.