I would not count on getting any profit from that. Off course the value of bitcoin is always a large factor on ROI,
8 Ghs Jalapeno generates currently about 0.006 bitcoins a day, so with current bitcoin value it would take around half a year (if taking electricity cost in calculation) to break even.
Difficulty is in the rise, and terahash machines are coming from multiple vendors during the beginning of next year, so more time it takes, more harder it will be to gain anything.