Here's the W610 page from the manufacturer:
http://www.sonyericsson.com/cws/products/mobil ephones/overview/w610i?cc=gb&lc=en
Prior to my current phone, I had what seems to be the predecessor to this phone, and it was excellent. It also has a removable memory card (comes with a 512MB one), that are pretty cheap to buy too, in the advent of her wanting to upgrade.
For example, you can pick up a 2GB card for �15 here:
http://www.ebuyer.com/product/125751
That'll store about 500 songs on it, or a mix of songs and photos, etc.