With the release of Thunderbird, some folks complain that it isn’t an Outlook-killer, as it doesn’t have built in calendaring and task lists (it does have an address book). The Mozilla Foundation is building separate components for most of those features, whereas the Mozilla (nee’ Netscape) browser had everything on one executable file. Jon Udell takes a look at the Sunbird calendar in Jon’s Radio today and reports: Mozilla Calendar. “It’s been a while since I looked at Mozilla Calendar, so this morning I installed the Firefox version and gave it another whirl. My first reaction was that this descendant of Netscape’s calendar program must share a lot of DNA with the original — it feels a tad clunky, UI-wise, in the same kinds of ways…”