Recently active topics in Pownce tagged with twitterfeed

I tried emailing this but no reply, so will try this path..

I run a site called twitterfeed.com which lets users post RSS updates to twitter. As far as I can make out, pownce blocks requests to pownce RSS feeds coming from my domain (just a simple wget from the domain times out, while from other machines it always works).

I had a similar issue with del.icio.us, who have now helpfully whitelisted the twitterfeed.com domain/IP addresses - any chance someone at pownce could take a look at this, and hopefully do something similar?

Yahoo Pipes and Twitterfeed receive 403 and 503 errors when items are clicked on the RSS feeds fed through them.

Pipes and Twitterfeed worked a few weeks ago so it seems a change was implemented on the Pownce side. Twitterfeed dev has looked into it and it seems Pownce is blocking the twitterfeed domain itself (can't even connect to the Pownce domain anymore to validate RSS feeds).

Are these intentional syndication limitations Pownce has setup or a technical issue that may eventually be resolved?