Lockjaw

Tonight I made a test run on what I'm going to make for a super bowl party tomorrow. Tostadas topped with fresh salsa.

For the first time making them the tostadas came out great. However the salsa...well it TASTED ok but it wasn't anywhere near being hot enough.

Here's my problem for the longest time I didn't eat hot food but here lately I've been eating more and more "spicy" food that hasn't really been all that hot. So I'm not sure if I can take spicy foods really well or if the stuff I've been making and eating really is not hot.

Anyway here's my recipe.

3 small tomatoes diced.
1/2 cup finely diced onions
1/2 cup fresh minced celantro
2 limes juiced
2 green jalapeno peppers diced.
and a little salt.

Chopped it all up stuck it in the fridge for an hour and tried it and again while tasty it wasn't hot or even really all that warm. Now one thing I DID do was I deseeded the peppers but I left the membrane as I heard that was the "hot" part of the pepper.
Should I just up the jalapenos? Fewer tomatoes? Different pepper and if so can you suggest a good kind to use? I contemplated going back out and getting some scotch bonnets(can't spell habanyero)but I head those were the hottest of the hot and I'm not sure if I should go that far without some advice.

Help!