been twice

since 2001.
$us still best, if all inclusive i'd take money for tips - the people there treat you brilliantly and will make your holiday a total pleasure - tip well as they get paid **** all and you'll really feel like they deserve it.
If you take any old football shirts their kids will be friends for life
In terms of what to do - take LOTS of books. but it's anything but boring... diving, deep sea fishing etc available at extra cost on most islands.
the things you'll have to pay (through the nose) for if you don't take enough are camera films (if you still use them) sun creams and anything imported basically.
Which island are you going to????
Check the resorts rules on what drinks are included as well and at what times - there's usually hidden extras such as drinking after midnight and certain eating areas not being included - these can go on your bill for credit card anyway i guess.
No topless sunbathing unless you want to get in trouble (although i did spot a couple of nice pairs

in very quiet bits) and it was illegal to take alcohol into the maldives so stash anything you buy on the way out well
Mobile [phones do now work on a lot of the islands but i can't remember the network for the life of me... it was about £1.50 a minute to receive or make calls so i'd leave it off - you won't want it when you get there anyway.
Most of the islands now have an internet terminal/room and also a tv room.
There is not a lot to do in the maldives but the setting is so stunning and the diving/snorkelling is jaw dropping... drink lots and relax
Oh and power - can't remember but a general boots universal power adapter worked both times.
The best thing i did was invest in an underwater case for my digital camera - got stunning shots and really good for memories a couple of years later...