[Teutonics]

Unless you signed a contract, there is no obligation to the company to stay for a certain time period. Likewise (especially with small companies), they usually don't feel obligated to keep you on should they have a downturn, etc. If that's not the case for where you work, you've found a quality organization for which to work. In the right organization, they will give you opportunities for growth and advancement (if you deserve them) which will make you want to stay with them.

The only obligation you may want to consider is to your resume... if you don't stay with an organization 6 months or more (a year is better), it looks bad to someone that is hiring. In today's job market, that can be a disadvantage you don't want. IF you even get the opportunity to interview with a new company, chances are you will be asked to explain why you left.

HTH.