The auctions website is yahoo.co.jp, it's in japanese but google can help to translate it.
I am from Russia, so I used
one of russian companies who can bid on yahoo. There could be other intermediaries , maybe from other countries, don't know for sure.
Only annoying thing is 100% pre-pay
(including intermediary's fee and shipping costs
), after that you can place bids using your account on company's website.
After you win the item, they receive it from japanese seller, repack thoroughly in their office in Sapporo, and send to your adress by EMS post.
Shipping time is about two weeks from Japan to Russia
( i successfully received two PDA's and some stuff for it
).