My two cents is don't use Squarespace. I've noticed that Squarespace sites usually don't work if a browser has a popup blocker is enabled - which is about 13% of online traffic overall, but a much higher proportion of technically savvy users (i.e.: podcast listeners). It's also much more expensive than some of the alternatives. I'd recommend wordpress.com instead. Most of the issues folks have with using wordpress as a podcast platform (primarily related to getting stats), won't apply to you if you're going with ebay for hosting. Best of all it's completely free.
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