The current list of supported Powershot cameras shown on the PSRemote page are:
PowerShot cameras supported
The most recent Canon PowerShot models that can be used with PSRemote are the G10, G9, SX110 IS, SX100 IS and S5 IS.
Please note: The Canon PowerShot G9 and Canon PowerShot G10 do not support shooting in raw mode when connected to a PC.
Windows Vista and Windows 7 Support: Now supported by PSRemote for recent PowerShot models. The following camera models are supported by PSRemote on Windows Vista and Windows 7: A620, A640, S80, S3 IS, S5 IS, SX100 IS, SX110 IS, G7, G9, G10. Older PowerShot models are not supported on Windows Vista or Windows 7.
The PowerShot models listed in the table below are known to work with PSRemote on Windows XP:
G1, G2, G3, G5, G6, G7, G9, G10
S30, S40, S45, S50, S60, S70, S80, S1 IS, S2 IS, S3 IS, S5 IS, SX100 IS, SX110 IS
A30, A40, A60, A70, A75, A80, A85, A95, A300, A310, A400, A510, A520, A620, A640
SD100 (Digital IXUS II), SD110 (Digital IXUS IIs), S230 (Digital IXUS 330), S400 (Digital IXUS 400), S410 (Digital IXUS 430), S500 (Digital IXUS 500)
The following Canon PowerShot cameras do not support remote capture operation and therefore will not work with PSRemote:
A series: A410, A420, A430, A450, A460, A470, A480, A490, A495, A530, A540, A550, A560, A570 IS, A580, A590 IS, A610, A630, A650 IS, A700, A710 IS, A720 IS, A1000 IS, A1100 IS, A2000 IS, A2100 IS, A3100 IS
Digital ELPH/IXUS: SD30, SD40, SD400 (Digital IXUS 50), SD430, SD450 (Digital IXUS 55), SD500 (Digital IXUS 700), SD550 (Digital IXUS 750), SD600, SD630, SD700 IS, SD750, SD770 IS, SD780 IS, SD790 IS, SD800 IS, SD850 IS, SD870 IS, SD880 IS, SD890 IS, SD900, SD940 IS, SD950 IS, SD960 IS, SD970 IS, SD980 IS, SD990 IS, SD1000, SD1100 IS, SD1200 IS
SX series: SX200 IS, SX120 IS, SX20 IS, SX10 IS, SX1 IS,
G Series: G11
S Series: S90
Other: TX1, E1, D10