Nice to see an ISP & speed selection addition to the speed test page.
The only other ISP's I can think of at the top of my head are Perlico, Gaelic, UTV and the mobile broadband providers O2, Vodafone and Three. On the other hand, I think it's worth leaving out the less common DSL providers, such as where one needs to take up their telephone service for their DSL package.
Another few speeds worth adding are 3Mb and 6Mb, as pretty much all the Eircom DSL resellers offer a choice of 1Mb, 2Mb, 3Mb, 4Mb and 6Mb.
If it's not too difficult to implement, I would suggest adding one more drop-down so that they would function as follows:
Select your connection - Dial-up, DSL, Wireless, Mobile 3G/HSPA/GPRS, Cable, Fibre, etc
Select your ISP - List of ISPs offering the above connection, e.g. O2, Vodafone & Three if Mobile is selected in the first drop-down.
Speed - Based on the connection, e.g. 512k, 1Mb, 2Mb, 3Mb, 4Mb, 5Mb, 6Mb, 8Mb, 12Mb, 16Mb & 24Mb if DSL is selected from the first drop-down.
If enough people perform the speed tests, assuming they chose the correct connection, ISP & speed, it will be interesting to see how each does on average, e.g. how well Eircom's 3Mb DSL service performs against Digiweb's Wireless 3Mb service.