It seems T-Mobile are prepping for the holidays already and they have a gift for BlackBerry lovers new (and old). They are offering free BlackBerry SIM cards with free internet and BlackBerry email for six months, providing you sign up before January 31st 2011. After that you can get BIS for £5 per month or £20 for six months. If you top-up £10 each month you'll also get unlimited texts.
This is great for those looking to try out BlackBerry and do not want a long contract. Of course you'll need a BlackBerry device to make it work.