I do not know if this is already possible or not but would like to see Web Host Manager Complete Solution (WHMCS)able to be integrated with the dynadot API. Would be great for domains and SSL certs.
If PayPal IPN were able to verify payment before domain was purchased and deducted automatically from dynadot account, would make life more simple and automated.
Not sure, but I would be more then happy to write a module for WHMCS. I have already written a Virtuozzo module (my username is timgws on the WHMCS forums)...
The only thing is that my spending amount is just over $250, $250 short of the required amount :]
Is there some way that Dynadot can give me access to the API so I can write the module, and give it for free to other Dynadot users who also use WHMCS? This would be a win win :)