Thanks to everyone for your concern and words of encouragement.
It's been almost two weeks since my original post and the weather has warmed considerably. There have been a few night temps. in the low 40's but nothing in comparison to the 2 week freeze.
This is my latest frost damage update:
My Tree Fern still looks bad but she's producing new fronds.
The Mango Tree has managed to hold onto a few precious leaves. The dead leaves are still attached to the tree. The thicker branches and 3" trunk are still showing signs of green, so I'm expecting her to recover.
My little Ponderosa Lemon Tree (not previously mentioned) lost a few leaves and is already sporting new growth.
The Passiflora looks bad but the main stems and larger branches are green. This one should recover too. After the foliage died I could see that she'd produced 3 fruit. I sampled them even though they were a little underripe. They were juicy, sweet/tart and delicious.
The Avocado and Banana Trees look absolutely awful. In 2008 they nearly got drowned by 6 days of standing water courtesy of Tropical Storm Fay, then they suffered a bit of frost the following winter. The banana trees never made a full comeback and it wasn't until the end of summer 2009 before the Avocado showed signs of progress. The recent 2 week cold spell just added insult to injury and I expect their recovery to be slow at best. The bananas are currently planted in a spot that would be great for a small garden. I'll probably transplant their rhizomes into large flower pots and and replace their former growing space with a few varieties of vegetables and herbs.
The brown spots at the base of my Trichoglottis leaves have increased in size. Her main stem and roots look healthy, but I don't think she'll be blooming this year. With the extent of damage I expect keikis instead.
To my surprise, there is no evidence of frost damage on my 2 Orange Trees. One of the trees had a few fragile blooms when two weeks of freezing temperatures struck. The blooms held and there are now a few dozen tiny oranges in place of the flowers.
This is a huge contrast to last year, when just a few random nights of freezing temperatures, destroyed every bloom and most of their foliage.