Karla, Western Way is the new entrance to WDW that can be used by those coming from Tampa, but not sure if would save you much tiime. Proceed east on I-275 and I-4 as previously described and shortly after you pass the US27 (Clermont / Haines City) exit you'll see the huge new interchange for TOLL 429, the Western Beltway. If you follow that north the first exit after you cross US192 is Hartzog Road/Disney World and you'd follow that into WDW. That road is Western Way and it connects to Buena Vista Drive adjacent the Coronado Springs Resort. The toll road costs $1.00. But this is only time-saving if you're going to the Animal Kingdom, AKL, Coronado and perhaps the All-Star resorts. For pretty much anywhere else just stay on I-4 and exit where you would have gotten off in the past, unless I-4 is backed-up and then the 429 would save time.
For those coming from the north on Florida's Turnpike TOLL 429 can indeed knock a half hour or more off the old drive via I-4.
BobK/Orlando