T-Mobile today unveiled the Nokia 5610 XpressMusic, the sliding big brother to the 5310 that dropped a few weeks back.  For $99 on contract you'll get a S40 slider phone with 3.2MP camera (with LED flash), 2.2" QVGA dsplay, 3.5mm headphone jack, and "robust music-friendly features" including a dedicated music slider thingy on the front panel.  T-Mo also throws a 1GB microSD card into the box for good measure.

There's no 3G support here, but if you can live with EDGE and are willing to trade in the 5310s extreme thinness for the 5610's more robust camera, you may want to have a looksee.  I'll be unboxing and testing my review sample real soon, so stay tuned ... The 5610 is available now in black with red accents and white with silver trim.