When you're shooting video, it's easy to fill up a memory card pretty quickly. To give yourself more time, you could buy bigger memory cards, though JVC has a different solution in some of its latest Everio camcorders: dual memory-card slots. Said to be the first-ever camcorders with two slots for SD/SDHC cards, they let you double your memory without buying expensive high-capacity cards. Recording is continuous, even when switching between cards.
Two cams in the new Everio line have dual slots: the high-def GZ-HM200 ($580) and the standard-def GZ-MS120 ($300). Both should be in stores by March.