Hate to break it to you man, but I use it for everything. It's my main machine. I can run PS just fine. Lightroom I don't use.
I use iWeb all the time. PS all the time. Flash, iphoto, visualhub, Toast...There is a large number of apps that I use on either a daily or weekly basis. Including running windows XP inside VMware Fusion when I need to connect to work VPN.
Right now when I do an uptime on my system, it shows this:

Leopard:~ timdsmith72$ uname -a
Darwin Leopard.local 9.2.2 Darwin Kernel Version 9.2.2: Tue Mar 4 21:17:34 PST 2008; root:xnu-1228.4.31~1/RELEASE_I386 i386
Leopard:~ timdsmith72$ uptime
13:18 up 3 days, 1:38, 4 users, load averages: 0.07 0.12 0.07
Leopard:~ timdsmith72$

The only reason I rebooted 3 days ago was because I installed that latest Security Update plus the other updates that came out about that time. (then patched with Marvin's of course.) Before that, the uptime was 29 days. So, find it hard to believe or not, I use that machine for EVERYTHING. :-)) The only windows box left in the house is the virtual machine. And I ONLY use that for work. (And it still runs on my Hack. :-) )