How many versions of the iPod can there be?

I want an iPod. Dont you? But which one?
Apple have just announced the iPod that plays video and last month the very slim Nano.
With all the choices my purchase juices are paralysed. I really only want it for listening to podcasts but now I can watch my favourite TV episodes like Lost and Desperate Houswives I might want that too.

I really think its too early for video. Need to wait until we see what other content will be available and a bigger screen and much longer battery life. Playing video requires huge amounts of battery and the new iPod that plays video only gets 2-3 hours of video playing. Its not enough for me.

What if they bring out a better one just after I buy one.......I'll keep watching for the perfect iPod for me...although maybe it is the Nano that is perfect for me.