I've got a Canon MV700 that is pretty reasonable for a take along DV camera. Its low light performance isn't brilliant, but it's fine for recording the kids for posterity. It's not really suitable for taking freeze frame images because of the CCD resolution (440kpix), but if you just need video clips, go for it.
Price is £219 here.
You may want to get a spare battery and some DV tapes while you're at it.
There's the MV800 that's got a 800kpix CCD rather than the 440kpix ccd of the MV700, that's £240 at internetcamcordersdirect.
If you visit DV sites you'll find other recommendations.