Now, just call the number listed at the site, follow the prompts, and bingo! You have an audio post on your blogger.com 'blog.
The registration error is most likely something like this:
Notice: Use of undefined constant unique - assumed 'unique' in /home/www/www.audioblogger.com/Connections/audblog.php on line 260
Warning: Cannot modify header information - headers already sent by (output started at /home/www/www.audioblogger.com/Connections/audblog.php:260) in /home/www/www.audioblogger.com/trial.php on line 175
Got me. I tried to contact Audioblogger from the contact address on their website, but it bounces with some relaying error. Ah well. Maybe this post will get some publicity to the error, or at least help folks to work around it.