I can highly recommend the online computer retailer - Scan.
I've ordered from them several times in the past, with each being fine. However, I placed an order on Saturday evening for a PSU, Mouse, HDD and DVD-RW for Project :: Blue PC. Monday morning I got stage 1 of 4, of their notification e-mails. Then 2. 3. And finally 4 at around midday.
Then just as I was leaving work at 5pm, I switched on my mobile and received a text message from them, telling me that my package had been dispatched!
They were right, as 8:30am this morning, I received it from a CityLink courier at my doorstep.
They've always been good with their delivery notifications, but receiving a text put them above the rest. Whether or not it was actually useful is another story - as I'd been checking the e-mail notifications that morning and I knew it was on its way. But hey.
If only Amazon followed in their footsteps. I ordered a DVD and a few games from them on Friday - but I've still not heard anything from them...