Actually HSphere supports domain registrations. At present I know for a fact other HSphere provider has this option to work for OpenSRS Tucows Domain registrations. But their prices for domain registrations suck at $15 a piece, no room for profit margins compared to Directi at sub $7 ranges. Therefore Directi integration would make JODO products more interesting.
In any case, I suggest JODO, as a hosting reseller provider, also offer domain registration service package outside of Hsphere. There needs to be an explanation that domain registration is offered and maintained as a separate entity; heck set a new entity up for this purpose alone. In any case this can work out well as Directi has good pricing and their control panel for resellers and customer control is simply great. Only downside is that their servers sometimes are on/off and buiggy; but things do work. I have been with Directi for short period and can vouch their customer service is poor but passes to solve your problems. In any case, domain registration is smooth when everything runs okay. Advantage is the control panel resellers get allows then to in turn sell to resellers if necessary. End user customer also gets own control panel to manage domains they own.
Only snag is that Domain Registration entails payment to the registrar with no possibility for refunds. This factor requires one approach this issue carefully to avoid fraud/non-payment issues. The Directi panel offers complete control over registration to allow registrations only if funds are credited into any account.
Anyone wants to sign up with Directi, can contact me. I will be happy to set you up for an account, Paypal accepted. Just PM me.