There are lots of programs that will allow you to control your Mac remotely from your iPhone. May I recommend that you try a free one before you resort to one that you have to pay for? Here is a favorite of mine:
Telekinesis, a Google Code project, works well with Snow Leopard, and it's free.
Basically it's a server application you download and run on your Mac. Then you connect to it using Safari on your mobile device; you don't need any other software.
Once connected, which only requires entering
https://your-mac's-address:5010, you can do the following:
- View and manipulate your Mac's screen (similar to using a VNC client)
- Take and immediately view pictures with your iSight camera on your Mac
- Do spotlight searches on your Mac
- Launch any application on your Mac.
- Open any documents, like PDFs, that Safari can display. This also means you can open media files that will stream and play in Safari.
- Other stuff: a remote that can run iTunes or whatever; run Terminal; run scripts (it accesses any scripts you have in ~/Library/Scripts.
All in all, pretty handy. And did I say it was free?
telekinesis - Remotely access your Mac through a collection of mini web apps on your phone - Google Project Hosting