Three and a bit.
1) Old MTB (Carrera summat or other) I bought for £30 9 yrs ago. It's my knock about bike, go anywhere, do anything. It's had a new back wheel, new chainset and headset (+the usual tyres, brake blocks etc) during its time with me, but it is still going v strong, and I aim to keep it for a long time to come. Till recently, it was also my occasional commuter, and it's been on mini tours also round Northumberland and also in London/Surrey around there.
2) The Roadie. Bottom of range Giant OCR4 bought 7 years ago, still going strong, just put new cassette on the back, so now its 52-39 front, 12-28 rear.. No problems, fantastic bike, love it to bits.
3) Most recent purchase is a Revolution County Traveller. It's only done 37 miles so far!! (but some twerp managed to scratch it already in the bike sheds grrr). I aim to get out and about on it a lot more as and when my current v busy work schedule allows me to.
4) The 'and a bit' is the frame/wheels of a 23yr old MTB which I aim to make into a fun single speed as and when I get round to it.