Intel's 320 Series SSD is best compared to the last generation Sandforce SF-1200 drives. The drive offers slightly better performance at a similar price point, but this is not enough to compete with Sandforce's latest SF-2200 controller. One reason is the old Intel SSD controller, another is the lack of support for the new SATA 6 Gbps interface. Really the only product highlight is the generous five year warranty, which doesn't get your data back in case of a drive failure. Recently there have been lots of reports of Intel 320 SSDs suddenly reporting as 8 MB capacity with all data missing. Intel has adressed this with a recent firmware update, but it's hard to recover a product's reputation after such issues. Also some users report that the update is ineffective for them.
If you are looking for an SSD, even if you have only the older SATA 3 Gbps interface in your PC I'd recommend the Crucial M4 which offers excellent price/performance, comes at a reasonable price per GB and is future-proof with its support for the SATA 6 Gbps interface.