Wow, amazing responses! Thank you guys, I've learned a lot from you :-)

I have another quesiton that's been bothering me:

Let's say I contacted my old company. I know that there are developers there that knows better than me (with regards to programming). Should I still pursue consulting there? What should I do?

P.S. Let's say I see the project that's going to be done would fit perfectly well with PHP, it's adequate and saves the company money. Then there are the developers that are .NET programmers and they are pushing that although let's say for the sake of argument, PHP would suffice.