What is the cheapest Cash-to-Bitcoin Service? There seems to be a few services to purchase bitcoins from out there, as in bitinstant, MtGox, bitcoin.de, etc.

I would like to know if someone has looked around to find the one with the cheapest transaction fees for buying/selling bitcoins.
In the U.S., the least expensive method is a Dwolla transfer to an exchange that accepts Dwolla (Mt. Gox, and Camp BX).  Dwolla charges $0.25 per transaction when the amount transferred is over $10.

Quite simply, depositing cash at a bank or 7-11, Walmart, CVS is going to be the fastest and easiest way.

One method that was the least expensive, depositing cash at an exchange's bank, is currently unavailable as the exchange that offered that (BitFloor) has suspended that method, temporarily apparently.

BitMe offers this but they don't have much liquidity yet (on the sell side) so that might not work.

If you are looking to deposit $500 or more, then Bitcoins Direct will accept that cash:


http://bitcointalk.org/index.php?topic=87094.0 (Deposit cash at Bank of America, Wells Fargo or PNC, minimum $500)


All other cash deposit options:


http://www.BitInstant.com (Deposit at major banks, 7-11, Walmart, CVS, Moneygram, etc.,)
http://www.BitMe.com (Deposit cash at Chase)
http://www.BitFloor.com (Deposit cash at Chase or Wells Fargo)
http://www.bitinnovate.com (Deposit cash at a bank in Australia &amp; New Zealand)
http://www.CAVirtEx.com (Deposit cash at several banks)
http://www.Spendbitcoins.com (Deposit cash at a bank in Australia)
http://BitcoinNordic.com (Purchase CashU or UKash in dozens of countries)
http://www.BTC-E.com (Deposit cash (USD) at bank locations in Russia)
http://www.BitNZ.om (Deposit cash (NZD) at back locations in New Zealand)
http://www.BitInstant.com (In Brazil using Boleto or Banco Recomendito, or in Russia, using Qiwi or Cyberplat.)
http://www.bitXoin.com (Deposit cash over the teller at Major Australian Bank Branches)


Alternatives:

If you are in the U.S., there is one vendor that apparently is offering to sell via credit card.


https://www.quickbitcoins.net


The fees aren't trivial but you can use a credit card to purchase by using VirWoX where you can buy SLL using your credit card, then trade SLL for BTC:


http://www.VirWoX.com


There possibly are other options that will work for you as well:


http://en.bitcoin.it/wiki/Buying_bitcoins


Last of all there is #bitcoin-otc where you can connect with sellers via IRC:


http://bitcoin-otc.com/