Re: battery dead, can't jumpstart?!?
If you only drive the car once every few weeks, you should really invest in battery maintainers. This way, your batteries stay new and your car starts every time.
As for the jumping issue - I've never been able to jump a car that is bone dead. The donor car just can't generate enough power to jump a completely dead car. Usually, it requires some sort of power pack to provide the necessary power.
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-Jason
(8/23/07-Present) 1995 Subaru SVX LSi (197k) Polo Green (#1102) 03/95
Mods: DDM Tuning 4500k 35w Low Beam HID, 100w H3 Bulbs, Extra Ground Cables, 15 minute $12.96 mod,
svxfiles designed transmission mount ( ), sporting a "new" tail light bar,
silver BBS rims, custom power steering cooler (one that doesn't dump ATF constantly), new negative lead cable, no more third or fourth gear 
(1977-Present) 1977 Chevrolet Corvette (81k) Silver
(12/01/2011-Present) 2005 Subaru Outback 2.5i Limited 5MT (97k)
I have a bad feeling about this.
-Obi Wan Kenobi
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