I installed 10.2 final, then used the option to register the opensuse oss repository after the online update.

This took a very long time.
Mostly because it was dowloading lots of useless data:
- patterns were downloaded for i386, x86_64 and ppc (this was an i386 machine)
- package descriptions were downloaded in many languages, although i only installed german.

buddel:~ # mkdir /tmp/descr
buddel:~ # cp `find /var/lib/zypp/cache/Source.zfrEAG/DATA/descr/ -name '*pat' ! -name '*.i586.*' -type f` /tmp/descr/
buddel:~ # du -s /tmp/descr/
684     /tmp/descr/
buddel:~ # du -s /var/lib/zypp/cache/Source.zfrEAG/DATA/descr/packages*
8500    /var/lib/zypp/cache/Source.zfrEAG/DATA/descr/packages
1772    /var/lib/zypp/cache/Source.zfrEAG/DATA/descr/packages.cs
1864    /var/lib/zypp/cache/Source.zfrEAG/DATA/descr/packages.de
9300    /var/lib/zypp/cache/Source.zfrEAG/DATA/descr/packages.DU
1808    /var/lib/zypp/cache/Source.zfrEAG/DATA/descr/packages.en
1848    /var/lib/zypp/cache/Source.zfrEAG/DATA/descr/packages.es
1808    /var/lib/zypp/cache/Source.zfrEAG/DATA/descr/packages.fr
1844    /var/lib/zypp/cache/Source.zfrEAG/DATA/descr/packages.hu
1772    /var/lib/zypp/cache/Source.zfrEAG/DATA/descr/packages.sk

so these are at least 7920kb needlessly downloaded data, for the opensuse-oss repository alone.
Which is a lot if you are on a modem, ISDN or GPRS connection.