Front242, things can change a lot in 2 years, and unfortunately NEP is not as good as it used to be. Obsessions is now known as True Obsessions - it still is probably the number 1 lb bar in NEP - and still caters more to the Asian lb lovers. It still has some of the best looking lbs on staff for Bkk. Total numbers are down - in the glory years, they had close to 100 lbs on staff, and now it's more like 70 and the full range from fem boys to busty Amazons.
It's amazing that Casanova is still going on, but it has to be due to the mamasan - she's been there for well over 10 years and keeps the lbs in line - taking care of customers. Barfine is still the same, but if you are going on a holiday (New Year's eve or New Year's day), they will increase the bar fine to 1000 Baht. This weird policy is to reduce the number of lbs who would bar fine themselves to take a day off to celebrate the holidays, and decreasing the number of staff working on the holidays.
The Thermae is still open, but no lbs allowed inside. Around 11:00 pm at night, though there will be a number of lb freelancers working the sidewalks just outside of it. Check in Bar has moved to Soi 10 - there is a thread about it here. It still is one of the better lounge bars to visit in Bkk. There is also another lounge type bar called Why Not? on Sukhumvit Soi 20 that has also become very popular.
There is a new lb bar called Mercury Bar in NEP. It's the sister bar of Temptations and Cockatoo (in Soi Cowboy). If you are looking for daytime action there are a couple of lb massage shops around Sukhumvit Soi 5-7. The former Nuch Salon has closed, and the new Wii Saloon is just a couple of doors down from the old spot (towards Soi 4). There is also a tiny lb massage shop located by Boss tailor shop on Sukhumvit Soi 5. It is called "Best Message" or similar and is a tiny sliver easy to miss. It takes up the space of 1/2 or less than a regular shop front. There will be 1-2 lbs in front touting for customers.