I see lots of good information below, about South Venice. Let's answer your specific question about Roanoke and Fundy.
Both of these streets are located west of highway 41, and north of Alligator in South Venice, heading towards the Gulf of Mexico.
Fundy Road is in the section that is named after the alphabet (Arcadia, Baffin, Cumberland, Devon, Everest, Fundy). Most of Fundy Road is within walking distance to Shamrock Park, and within just about 8 blocks of the Beach Ferry and Community Boat Ramp (membership is only $75, each, per year, per family).
There is one house for sale on Fundy right now: a 3 bedroom, 2 bath, 1 car garage home built in 1987, with updated kitchen (granite, stainless, etc.) asking $129,000. Most lots in this part of South Venice are either 100 or 110 feet deep, by 80 or 100 feet wide. This particular home sits on a 100X100 lot.
Roanoke is a couple blocks north east of Fundy, and not in the alphabet section. So, it's about 10 blocks to the beach ferry or boat ramp.
There is only one home for sale on Roanoke right now. It's a very new (1999) very large (2117 under air) home with a THREE car garage on a 120X100 lot, priced at $221,900.
It is not unusual to see a larger, newer home, with a 3 car garage, on an oversized priced for $200,000 or more.
I would say both Fundy and Roanoke offer a nice area, with pride of ownership, friendly neighbors, and good sized lots.
If you are local and wish to see either of these properties, I live and work in Venice. Feel free to contact me.