My wife and I stayed at the Bohemia twice, once at the start of November 2011 for 4 nights and again from the 29th of November to the 3rd of December and didnt have a problem with bed bugs. Different rooms each time, so would say the issue has been dealt to effectively. Quite a few English speakers staying and chatting in the breakfast room and no mention of a problem from anyone. We had a great stay! Would stay again if back in BA.
The staff were consistantly helpful and very friendly and the breakfast was great judging by the standard of breakfasts in other Argentina hotels!

When we came by remise (airport taxi) through the San Telmo district at 11pm to our hotel we wondered what we had got ourselves into!
This little boutique hotel shone brightly in an otherwise dark and dubious looking street - but don't judge a book by its' cover. The area was safe and all the locals are friendly and helpful.
All the staff at the hotel went out of their way to make us feel comfortable and were always willing to help out with just about any request.
The rooms were small, but clean and the beds were comfortable and the breakfast was substantial.
We discovered we could get just about anywhere within a block or two by public transport (1.20peso per trip!!! beats going by taxi all the time)

We stayed in this hotel on October 29 and 30, 2011. During our first night, at room 111 we were viciously attacked by bedbugs. My husband counted 182 bites all over my body. I had to go to the pharmacy to purchase pills and a medicated cream. My arms, specially, were in a very bad state. All duirng our trip in Argentina I had to cover my arms as these looked just terrible with all the marks and pink rash. The hotel staff apologized on the morning of October 30 and changed us to room 209. The next morning, we had more bites in our bodies. We cancelled our reservation for other nights and went to another hotel where we did not have a problem with bedbugs. The rooms at the Bohemia hotel looked clean, as well as the bathroom, but the beds had bedbugs, and they need to get rid of those mattresses, not just fumigate. The area around the hotel is a bit run down and there is construction going on. It is not a very long walk to go to the center of town. The breakfast was adequate.

I stayed 2 nights at this hotel and was not overly impressed. It is neat and simple - like many other hotels in BA - but there is construction in the immediate neighborhood (within 1-2 blocks), so be prepared to be woken up early in the morning.

If you're the young/social type, you'll have a much better experience - in terms of affordability, room space, quiteness in your room, proximity to good food, English-speaking staff and overall hospitality at the Circus Buenos Aires Hotel & Hostel. It's just 5-6 blocks further away from the action than Bohemia but much hipper and still in San Telmo.