Sorry, if it's been said (I couldn't find it) but there's press out saying T-Mobile UK are selling a 8110 for £185 and than includes "unlimited" (fair use policy) BIS based email and GPRS access for a year. So you can pay your £179.99, top up £5 and never pay more for a year. Txt's and call's work like a normal PAYG phone.
Can't say I'd go down the PAYG route myself, but sounds like a cool present for someone (or for anyone that doesn't want to use their BB for calls/txts)