Are these 335mhash/sec USB ASIC miners a good thing?

[peppelakappa]

Hi forum,
I'm new to bitcoin (or alt-coin in general) mining.
I've searched a lot on this forum, trying to learn as much as I can about btc and alt-coins but I can't understand something about these little ASIC miners.
I'm talking about the ASICMiner's USB Block Erupter (Rev 2), the one that is capable of computing ~33-335mhash/s.
Are they profitable?
With some of these, can I actually mine something or I'm only dreaming?
Thanks for your help

[jpcosta]

I wouldn't recommend it, unless its for a fun side project. You can mine something but with the difficulty ever increasing and new devices coming in the profitability drops really fast.
If you started mining right now 24x7 and with electricity costs in mind it would take you over a year to turn in a profit

check in here http://minr.info/

[miffman]

You will probably never ROI, unless you buy it in FIAT and hope the amount you mined goes up in price

[peppelakappa]

What is FIAT?
Another question: one of these could perform better with a SHA256-based altcoin?

[crypto_mks]

http://en.wikipedia.org/wiki/Fiat_money

I've been using 6 x block erupters on a USB hub for a month or so for fun and learning about BTC.  It's slow to build up any substantial amount of bitcoins with roughly 2GH/s, but I did make 148 USD although mostly due to the BTC value shooting up so high since I started.

[mvidetto]

Better off buying bitcoins imo, the price is dropping currently as well.

[crypto_mks]

Without substantial hash power it is starting to look like more potential for me in trading vs mining.