GPS - анти3,!4здинг - реально ли?

в общем думаю заказать либо
http://www.dealextreme.com/details.dx/sku.28710
либо
http://www.dealextreme.com/details.dx/sku.22968

Первый компактнее, но я так понял что у него нет возможности подключения к компу.

По поводу веса - электроника должна весить не более 100 грамм, самое тяжелое - аккум, который вытянет на все 300, короче полкило это все велу имхо добавит. Но учитывая то что вес будет размещен гораздо ниже точки равновесия (в районе педальной втулки) то заметного воздействия при езде создать вроде он не должон. (то же самое что в оба боковых кармана по 2 булочки положили)

Вот то что нам нужно :-)
http://www.autopulse.ru/item7036.html

Движение вполне можно поймать гироскопом если хочется экономить заряд.

И куда ты их подключиш? К какому серверу? Или просто координаты будеш ловить на телефон?

Как работает вот эта шняга
http://www.dealextreme.com/details.dx/sku.28710

Можно с датчика велокомпа снять

Immobilise.com ImmobiTag Electronic Cycle Protection Kit

* A radio frequency identification device containing a globally unique number, giving your bike a unique identity
* Designed to fit simply and securely into the seat posts of bikes of 25mm -30mm diameter
* Uniquely activated by the bike owner on the UK National Property Register at www.immobilise.com making all the information viewable nationally by UK Police via their internal systems. This can include the bikes frame or other numbers and photos as well as owners contact details.
* In the event of loss or theft a report on the owners Immobilise account alerts the UK Police, in the event of recovery they can then contact the registered owner, return the bike and investigate any criminality.
* In addition a certificate of ownership including all the registered details can be printed from the Immobilise account which can be provided to the Police and insurers.
* Does it work? Yes, the data on Immobilise is checked nearly 1 million times a month with a average hit rate of 22%.

A bike is stolen every 71 seconds in the UK. Tag and protect your bike with ImmobiTag, an easy-to-fit device that's embedded into the bike frame and is almost impossible to remove.

What is ImmobiTag: ImmobiTag is a radio frequency identification device (RFID) designed specifically to be embedded into a bike's frame. Each tag contains a unique serial number that can be read by the Police, making the bike, registered owner's details and the bike's status viewable directly on their systems. ImmobiTag is linked to all UK Police forces, protecting your bike for life.

About: All ImmobiTags are activated online at Immobilise.com, the world's leading possession ownership database system. Photos, descriptions, receipts, frame numbers and other relevant information can all be added free of charge when registering your ImmobiTag. In the event of theft the bike's status can be changed from within your online account, notifying the Police and the second-hand trade. By doing so, a certificate of keepership can be created to assist in the completion of an accurate crime report and insurance claim. All aspects of your bike ownership can be managed online with no recurring fees or subscription charges. If you sell the bike, or move home, this can be updated without charge.

Вот то что нам нужно :-)
http://www.autopulse.ru/item7036.html