Ugo picks up on my question on XML-encoding (or not) blog bodies in feeds:
I'd say neither. Putting HTML content in an RSS description is a bad practice that was spawned when someone decided that RSS would be used not just for summaries (as in Rich Site Summary) but for syndicating the whole content of weblogs.
Yep. Technically, Ugo is right. Building an aggregator which works across all cases must be hell. Practice demands this though: I had my new blog (and feed) up for only some hours, and three people came and asked for blog content in my feed except of excerpt. And since I discovered Aggie, I feel like having found a decent aggregator, and I prefer having blog content in-place rather than having to traverse a link.