Will the non-compete clause be enforceable in my situation?

Four years ago, I signed an employment contract with a non-compete clause with Company A. Company A is mainly in the business of training and contracting trained consultants out to larger consulting firms with direct relationships with large corporations. In other words, they sub-contract consultants. The training provided by Company A can be attained at colleges or technical schools but Company A claims that it is proprietary in the employment contract.

Three years ago, I was placed by Company A through Company B as a sub-contractor in Company C. FYI, company B is a preferred vendor of company C. I have been working for Company C for the past three years. But for the past two years, I was the only person from Company A working at Company C.

About a month, I was informed by Company B that Company C has made changes in their sub-contracting policies limiting Company B to sub-contract from a list of companies that is defined by Company B. Now, Company B decided not to include Company A in that list. Hence, I stand to lose my job with Company C which I have received an extension to continue work with them until the end of the year. As Company C has a list of preferred vendors, I approached Company A with this list urging them to contact these companies in order to sub-contract me through them to enable me to continue working at Company C. Also, I informed Company A that they had a deadline of 1/1/2011 to make this happen.

For the longest time, Company A did not express any urgency to help me secure the continuation of my job. Out of panic, I stepped in to put Company A in contact with Company D (preferred vendor of company C) which was willing to help me but Company D was not approved to work with company A. While Company D was working to get Company A approved, I received an offer to join Company E (preferred vendor of company C). On 12/31/2010, Company A was still not approved to work with Company D. Since I was afraid to lose my position at Company C, I decided to join Company E.

Now, Company E has worked with Company A in the past but I am not sure if they are currently in business together. Company E has a relationship with Company C but Company A does not.

With this said, here are my questions.
1. Since Company A does not compete with Company E because Company is a sub-contractor while Company E is a contractor but the non-solicitation and non-compete clauses states that I am not to work for Company A’s customers, would the clause be enforceable?
2. Can an employment contract not have an end date? Is it legal?
3. If the non-compete clause requires me to wait two years before being able to work for the clients of Company A, would the court deem this reasonable?
4. If I am required to pay 30% of my annualized wages but no less than $25,000 on the first day I start my job with my new employer, would the court deem this reasonable?
5. Base on the situation I described, what are my options?