If you take your cash from mtgox and run it through a tumbler, then have it incrementally deposited out to your ewallet (some of the tumbler services do 5 or 10 withrawals and do this for 0.02 BTC for the service), it would be practically impossible to trace from there. Then you can run it straight into SR. from your ewallet.SR has a built in tumbler, and while some people have claimed that the outgoing only goes to one BTC address, you can transfer out to a tumbler again on your way out, then incrementally back to your ewallet and then to MtGox if you wish to cash out. Basically it is extremely hard to actually identify WHO is at an address, but it theoretically can be done (I'm not sure if it has yet - if anyone has heard please post it!). That being said all you are doing with bitcoin native is downloading the latest block, and your transaction (if applicable) would be logged within that block - address-to-address. It doesn't actually have a receiving IP just a BTC address and if your address is in that block it simply has to be downloaded 5 times to confirm the transaction.If you cash out to something like LR instead of Dwolla it is much harder to trace because a) LR is offshore, and b) you can make LR payments anonymous. I use LR and Pecunix (although I can't use Dwolla because I'm not in the US - I wouldn't anyway except to put funds into Mtgox and only as a second-string to LR).Just add in a tumbler on each side in between MtGox and e-wallet, and you remove virtually any risk of having your BTC address linked.I am way more worried about landing myself in an LE exit node on Tor than I am about BTC though. I can just imagine a prosecutor trying to explain BTC addresses to a jury... lol.