>>> What do I do with this money? <<<

Check with your nre employer again. Many plans will allow rollovers to the plan even if you haven't met the eligibility requirements. If you don't want to / can't do this, then the best option is to roll it over to an IRA. Any investment company can help you establish this IRA.

>>> I've heard varying answers as to how long I can leave it sitting with Old Co. Not to mention, I can't contribute via Old Co. <<<

If your vested account balance is $5,000 or more, Old CO. cannot make you take the money out of the plan. If it is under this amount, they can "force" your distribution. If they notify you that they are going to do this, roll the money over as soon as possibl eto avoid taxes and penalties. IF, as you say, the accounts are doing ok, it may be ok to leave the acct balance in the Old Co. Plan until you are sure what you want to do.

As far as not being able to contribute to Old Co. Plan. That doesn't matter because you can't contribute to the New Co Plan either. Your only real option is to open an IRA and put the $2000/yr in until eligible for the 401(k)

Hope this helps!

JEhmig