The phone automatically start some apps that I'll never use.

Ones such as:
Peep
Stocks
Footprints
Flickr
Friend Stream
Wi-Fi hotspot (till I choose to use it)

(At least they appear as running in the background manager)

Since I removed all twitter details from Peep, it's at least stopped notifying me etc - but surely there should be a way to stop things running till you use them...