Whats the deal with ISA's?

[clipclop1]

(second attempt at asking this question...!)
I have never had an ISA and (like everyone else pretty much) haven't got a lot of cash at my disposal usually so though it would be a good idea to open up an ISA and leave it to earn interest and put a little bit in every now and again... now, i sound like i know what i am talking about but really I havent got a clue where to start... what is a good rate? which is the best bank/building society to go to for one? do i have to put in a certain amount of money to start one...?
Dummy proof advice please!! haha!
Many thanks!

[factor-fiction]

I suggest you start here:
http://www.moneysavin...e-savings-without-tax

[DocHH]

I'd echo factor30's repsonse. Also a trawl around your local Banks and Building Societies will reveal the best interest rates for Cash-Mini-ISAs. Beware of temporary bonuses, unless you are prepared each year to transfer the ISA. Unless you are a higher rate tax payer or likely to exceed the Capital Gains Tax limit, Stock Mini-ISA's are probably not for you. Professional advice is advisable as circumstances change depending on your situation.