Metalinks were ready for 10.3 Alpha2 ISOs at http://download.packages.ro/metalink/opensuse/ when the mirrors synced. Note, these .metalinks do not yet contain repair information.
*TESTING* Metalinks with repair information listing multiple ISOs are at http://download.packages.ro/metalink/testing/opensuse/collections/
(GetRight seems to have problems with these at times, but other clients are reported to work).
(Repair info with single Metalinks for each file are at http://download.packages.ro/metalink/testing/opensuse/ )
aria2 is recommended ( http://linux01.gwdg.de/%7Epbleser/rpm-navigation.php?cat=/Network/aria2 ) but please report experiences with other clients.
If you have the KDE4 development installed, these should be usable in KGet (you'll probably have to compile it yourself).