Educ8s.com has kindly put together a new tutorial for those Arduino lovers. You really do not need to get
What you really need is an ATMEGA328P with Arduino bootloader which costs around 2 Euros along with some inexpensive passive components and a 16MHz quartz crystal. For the communication you will need an inexpensive USB to serial converter which costs around 3 Euro and can be used for all your breadboarduinos!
Watch this step-by-step video and DIY your breadboarduino.