I started off a couple of weeks ago with my GPU. Too slow.
Now I'm using a USB ASIC miner at 335 Mh/S. Too Slow.
I've got a Red Fury on order. It'll probably be too slow, too.
It is not the speed alone that is the problem. you can buy the fastest miner available and still not make any money as long as you pay more for it than you are likely to get back out. Block Erupters and REd/Blue Furies tend to sell for more money than you will be able to make with them on places like ebay.
I too have started off with just the GPU on my main computer (Asus GTX 660Ti Direct CU II OC) and my laptop (Radeon 7730m,) what I've noticed is that Radeon cards outperform Nvidia for mining and that if you're going to GPU mine then you should'nt mine Bitcoins as you should Mine Litecoins and any other Scrypt crypto currency.
It's been a long and tedious process but I no longer mine at bitminter because they hold you earnings until you gain 0.01 BTC; instead, I opened an account at:
https://www.cex.io and I've been mining at their pool (stratum+tcp://us1.ghash.io:3333) using BFGminer while doing the free bitcoin and litecoin giveaways that pay off once a week.
http://freebitco.in/?r=195371 for bitcoins and
http://ltc4you.com/?r=37458 for litecoins. When you open a cex account it provides you with wallet accounts for these other different cryptocurrencies and when you get a payout you can just re-invest what little you make off of your miners and the coin giveaways for GHS cloud mining. It's a very small start but it definatly builds up and seems to be paying off so far.
The only other thing I can suggest for a new miner getting into it is to buy a powered 10 port USB hub that supplies 2.5-5 watts of power per port on it and buy antminers for $67.00-$89.00 that run at 1.6GHS ea. Its a cheaper solution plus you can re-invest your profits into your cloud miner at CEX and have a higher and faster payout in the period of time that you're spending just mining with your GPU.