I'd be very happy to see DT Register support SEF URLs automatically. I can use Artio JoomSEF to create specific URLs for individual DT Register pages, but this is very time consuming. If I try to let JoomSEF auto-generate URLs for DT Register, the component breaks.
Correct... we'll certainly try to get a SEF plugin soon... however support for core Joomla SEF urls is already there and fine. You can set Artio, sh404SEF, etc usually to just run core Joomla SEF handling per component... so instead of totally disabling SEF for DT Reg, tell it to handle it with the core option.