Changing Platforms Without Losing Current RSS Subscribers?

[Theinc]

Can this be done and how exactly do you go about doing it?

[encyclo]

What problems are you expecting? If the feed is at the same URL, then the end user might get a full refresh when you switch over, but no long term effects. If you are changing the URL of the feed then you must add a 301 permanent redirect from the old to the new URL.