In reply to Donks: I had a partial rupture of the A2 pulley at the beginning of the year, I taped it up immobilising it for a few weeks, did not use it at all, hard to tie laces up and open doors but you get used to it, I did not do any climbing at all, or anything the could aggravate the injury, I have been testing the finger lately, feels good but will be taping up before I push it, for the foreseeable future. A full rupture would require similar treatment immobilise for a few weeks, no climbing for 3 months min', I could be wrong but found reading "One move too many" to be very helpful,
http://www.thebmc.co.uk/modules/article.aspx?id=4246
this can be a depressing time, so focus on other things to keep climbing fit, yoga etc.
get to a good doctor/physio as soon as possible, the worst case scenario is surgery. and a year out.
good luck
http://onlineclimbingcoach.blogspot.co.uk/2010/05/a2-pulley-injuries-review...
http://www.allclimbing.com/archive/2009/02/partial-rupture-to-a2-tendon-pul...
http://www.nicros.com/training/articles/finger-tendon-pulley-injury/