You can buy those LCD picture frames - you put all your photos on memory stick and then cycle through them.
Some people have put on a series of Vegas pictures - you can often get CDs full of pics in the gift shops.
Others have taken pictures of their friends holding a giant fake cheque in front of their own machines.
This gives you lots of great material - (lit up) with very little space used.
If you want to get all vegas (gawdy) you can get a string of LCD lights and put it on the back of the frame, simply cut to length.
or buy one of those Welcome to Las Vegas table signs that work on 2 AA batteries and MacGyver something to the frame.