Im sure youll soon get a few suggestions for a short list from the many happy owners of these camcorders on the forums
Short of Borrowing to try in a shop with a deposit and firm agreement to return ,hiring one ( affordably) may be hard unless you try places like Cash converters etc where you can buy off them an sell back to them later

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Even Argos have excluded cameras and camcorders form the 16 day no questions asked return
They are nore a lt more mainstream and Im certain youll find one you like
Im not sure how much the miniDVD discs cost, how many youll end up needing and how long the " short" talk is
An altenative setup would be:
A non-DVD camcoder (Tape/HDD) coupled with a resonable cost settop DVD recorder with HDD . It may cost a little more in the short term but be worth it in the long term.
It has some distinct advantages : I tried my camcorder ( tape based) and recorded directly to HDD of settop recorder watching it on TV simultaneously and making a DVD from it ( fast dub) a few minutes later