Thanks for the info, Salty and Larry. I'm really curious about the RAM upgrade. I bought my machine in the summer of 2008 with 2GB, and in the spring of 2011 I upgraded it to 4GB with an order from Memory X. I then had some terrible instability issues that ended with me re-installing OSX. After much back and forth with Memory X, they replaced the RAM ...in October. IIRC, they sent me a slightly different RAM type. I've had [knock on wood] a fairly stable OSX experience since then. This is the MemoryX page for my machine, which states 4GB is the max it can use. Conversely, OWC lists this (6GB) RAM pair as being compatible with my Machine (early 2008). I am of two minds on this. One, I don't want to go through another bout of RAM-induced instability. The number of kernel panics I had with the bad 4GB was insane. There's nothing like having one's laptop grind to a complete halt in the middle of a live DJ mix. That said, boy would another 2GB extend the life of this machine. It is my goal to keep this wheezy old lappy going as long as possible, so if and when AAPL finally does a proper refresh of the Mac Pro, I'll have sufficient funds necessary to buy one. There is no Mac Tax like the Mac Pro Tax. ...and if they don't refresh the sodding Mac Pro in 2013, I'm going to piss on Jobbsie's grave. >.<
WRT backups, I have an exhaustive assortment. I use Time Machine, I rsync to an external 1TB drive regularly, and mirror that drive 2x as well. I also have two images of my pre-SSD machine (the original 2.5" HDD, and a 3.5" clone). Based on what Larry said, I think I'm going to investigate the 6GB upgrade option first, and see (A) if my machine even runs with that combination and ( if so, how stable it is. If 6GB works out, I'll consider upgrading to Lion. I now have a 10.6-compatible version of 1Password, and (as I said before) I've got TRIM support enabled, so my need to upgrade to Lion is not as significant as it was previously.