I have been building sites for a long time. and have user both drupal and Joomla , even built a lite version of Joomla called Limbo CMS long time back. They are both quite good CMS’s. Given the two I would choose drupal any day for myself ( though would never recommend it , cause its still not easy to make it do what u want ) , but am no designer and drupal templates are a big let down, though not hard but templating drupal is just a pain. And template wise Joomla simply is Awesome ( the quality of premium templates available is just so good ) , and its easier to work with for not so technically inclined.
And i have been looking for a good social networking script since last year , and having looked far and wide from paid scripts like phpfox,handshakes,socialengine etc to free ones like Dolphin(not really free),elgg,phpizabi,Joomla+CB. Most of them are really bad and nothing i would build a big site on , its just that bad. There is hope in hosted platforms like ning,socialgo,colletivex but they are hosted , never recommended for anything serious. The only good social networking platform out there is Drupal - has everything i need from scalabilty , security , documentation etc . But again the base install requires hours of tweaking to make it look anything like a normal social script.
So my after taking a few months off from freelancing , ive decided to work on a new personal project called Joodr. It aims to be something like ning but free, based on drupal so that its as flexible,scalable,secure and use Joomla 1.5 templates so your sites look awesome without much effort. The name Joodr i simpley got from Joomla + Drupal , though its a basically a customized install profile of Drupal.
Work has started so keep reading for further updates !!! And if you have any ideas and suggestions let them flow.

What about wordpress - whats your opinion about that?
@Binny - for wordpress there is a social mod called buddypress, but its a little too simple to compare with other scripts so i did not mention it.
Very interesting project, but the name looks as the word for “f*ck” in Spanish. :-/
nice job dude……..
How far have you come? Any thing show yet?
Would be very interested to know more about this project!! I’ve bee building social networks on the Joomla/CB platform and am just getting beyond frustrated with the limitations. Have been looking at the functionality that Drupal offers, but have yet to use it and don’t care to have to spend extra hours trying to get it to look good.
So definitely very interested, let us know what the status is!
Adding this to my bookmarks. Thank You
U r doing great thing .
“Given the two I would choose drupal any day for myself ( though would never recommend it , cause its still not easy to make it do what u want )”
=> I have bundled my experiences in an ebook that is a step by step guide for how to set up a full featured social network with Drupal: Drupal 6: Ultimate Community Site Guide. The example case study site is at drupalfun.com, a social network for drupallers, where you can ask any questions you have during the process.
Greetings,
Dorien
Hey this sounds great and is something lacking right now. Would be interested in know more and possibly your skills for a possible project.
Please tell me you are making progress. If it were stable and as you advertise, I’d change from Joomla today. I am a real Joomla supporter. largely becuase it is more accessible to those pressed for time and talent.