The solo band award goes to...

...Rockband Unplugged on the PSP which, despite my expectations, has proven to be a really fun experience well designed to take into account the platform. Converting the inherently social and co-operative game-play model of Rockband to a single player experience on a handheld was always going to be a challenge, but they have done a great job with it. The 'phrasing' mechanic works really well and makes playing all the different instruments by yourself seamless and eventually challenging. The rest is top notch as you might expect, good song listing (with DLC available) and the usual visual polish and options for customising your band. It's well worth checking out. Perfect for short play sessions on the PSP.

...also in keeping with the traditions of the series I completely and utterly fail at being able to play on any level above medium, but still enjoy the experience.