Having dealt with Silicon Valley VCs and their clones in India, and are currently dealing with them in my current start-up, I would be very careful in understanding very clearly "What kinds of Ventures are they funding currently?" and "What kind of growth path are they looking for?". I would not believe for one moment all the "motherhood and applepie" pitches VCs throw out periodically in the meetings where they are trying to inspire people to go the venture funded startup route. Many will find out these realities very painfully!
At any time, only certain sectors are "hot" with VCs. These are
1. Online versions of successful proven US ventures such as Naukri(a la Hotjobs,Monster), Seventymm (Netflix in the US), Redbus, Travelwala (a la Expedia in unexplored sectors like bus tickets).
2. Web 2.0 startups (whatever they mean) - like clones of LinkedIn, etc.
3. Software As A Service (SaaS) - SaaS versions of popular software that can be Standlone (like Sales Force AUtomation), CRM, etc
VCs have bosses (Pension Funds and other larger VC funds in US and wealthy individuals in India) just as they are bosses to startup companies. They have to show 10X returns or some part therof on the whole. They looking for 9 so-sos and 1 that's a google like winner that can make the rest of the investments reach 5X or 10X the investment in their current fund.
So as such if your startup is in the Enterprise Software side, you may get a lot of meetings, waste a lot of time and get the runaround. They will see if you are still around in 6 months time to ask for money! From their point of view they have reduced their risk if they make you wait and see if you have added customers fast enough at a rate that shows immense potential!
Nothing succeeds like success. In fact the ONLY thing that matters is if companies are willing to shell out money to buy your product. Do they have a pain and is the pain, painful enough for them to spend money TODAY. Not Tomorrow or Day After. Today!
If you can show very fast growth in some company, no matter if you make and sell cow-dung cakes, as long as you can show $50M in 5 years, you will get venture funding. But this is a chicken or egg - which came before kind of situation. You will have to show some growth before you get VC funds and to show the growth you may need the VC funds.
Also remember that growth does not have to be in terms of revenues alone - if you can demonstrate that your business has the potential of achieving other growth parameters like hits on a web site, signing up even for free, high spending young people in India, etc - those can attract venture funding.
You will have to get friends and family to pitch in for a product company. It will be painful to get to a stage where you can start lining up customers but persistence and focus may pay off - you may not need venture funding - Oracle, Microsoft, PeopleSoft were all companies that grew a lot before they took small or no venture funding.
The trick is to understand how and why VCs invest money. This is where including me entrepreneurs delude themselves till they are bankrupt with all kinds of self-delusional talk - my product is so great that people will realize how great it is and line up before my gate - my product is so patentable that no one on earth will be able to figure out for another 50 years - all of them painful lessons to learn. You don't want to do that I have been in many even venture funded companies that do this! By the time I finish this post the dynamics could have changed with the Financial Meltdown in the U.S. These things keep changing constantly!
If you have an idea that is defensible IP wise and has global potential, go for it. If you build a customer base quickly and compellingly the VCs will call on their own.
That's the only way to prove that your idea is good - show customers willing to shell out money for buying it rather than fool around in-house for ever with half baked substitutes!
Good Luck!