yes, you can check it. We wrap it in bubble wrap then pack it in a suitcase.
I took mine as a carry on--I'd NEVER trust a $300++ computer based machine to baggage dungeons or handlers. They'll damage or steal something worth a lot less 
It fits perfectly in the overhead bin. It went thru the x-ray machine with no problems (blade in place in the machine)--barely a second look by the screener.
Rae
I think there are bag made to carry the Cricut-- look on provo craft.
http://cgi.ebay.com/Expression-Cricut-Cake-Rolling-Tote-NEW-Red-White-/290442126423?cmd=ViewItem&pt=US_Die_Cutting_Machines_Dies&hash=item439fb32457 Rolling tote for cricut expression and cricut cake
I carry on everything these days for my work travel (even carried on my first cake this Spring!), but the last time I checked luggage was on my way to Mexico to visit my brother. I had totally random things that trip - I checked a toaster oven, a massage table and microwave in their original packaging/boxes and they were fine on arrival (they don't trust ANYTHING to be delivered down there!) But if you're nervous, just carry it on and minimize the other stuff you would need to carry on so you don't go over the amount of carry-ons allowed. 
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