FreeOnlineCalendars
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Calendars.net (still the winner)
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Good: simple layout, visitors can add events (optional login).
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Bad: flaky servers, no RSS, javascript links.
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Upcoming.org (yeah, I use it)
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Good: popular, nice design, social aspect, RSS.
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Bad: only list view, iso-8859-1 annoying.
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Localendar (testing; Vicky recommends)
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Good: simple layout, OK design, RSS.
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Bad: minor featuritis, obligatory end-times, layout bugs in Moz.
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